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Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"end":"2017-12-31","val":11104000,"accn":"0000018172-19-000012","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2017-12-31","val":11104000,"accn":"0000018172-19-000029","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14"},{"end":"2017-12-31","val":11104000,"accn":"0000018172-19-000036","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-12"},{"end":"2017-12-31","val":11104000,"accn":"0000018172-20-000014","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-27","frame":"CY2017Q4I"},{"end":"2018-03-31","val":7778000,"accn":"0000018172-19-000012","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":6636000,"accn":"0000018172-19-000029","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2018Q2I"},{"end":"2018-09-30","val":7356000,"accn":"0000018172-19-000036","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-12","frame":"CY2018Q3I"},{"end":"2018-12-31","val":8668000,"accn":"0000018172-19-000012","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2018-12-31","val":8668000,"accn":"0000018172-19-000029","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14"},{"end":"2018-12-31","val":8668000,"accn":"0000018172-19-000036","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-12"},{"end":"2018-12-31","val":8668000,"accn":"0000018172-20-000014","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-27"},{"end":"2018-12-31","val":8668000,"accn":"0000018172-20-000037","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-15"},{"end":"2018-12-31","val":8668000,"accn":"0000018172-20-000049","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-14"},{"end":"2018-12-31","val":8668000,"accn":"0000018172-20-000057","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-16"},{"end":"2018-12-31","val":8668000,"accn":"0001558370-21-002392","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2018Q4I"},{"end":"2019-03-31","val":5842000,"accn":"0000018172-19-000012","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"end":"2019-03-31","val":5842000,"accn":"0000018172-20-000037","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-15","frame":"CY2019Q1I"},{"end":"2019-06-30","val":6534000,"accn":"0000018172-19-000029","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14"},{"end":"2019-06-30","val":6534000,"accn":"0000018172-20-000049","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-14","frame":"CY2019Q2I"},{"end":"2019-09-30","val":7499000,"accn":"0000018172-19-000036","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-12"},{"end":"2019-09-30","val":7499000,"accn":"0000018172-20-000057","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-16","frame":"CY2019Q3I"},{"end":"2019-12-31","val":6433000,"accn":"0000018172-20-000014","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-27"},{"end":"2019-12-31","val":6433000,"accn":"0000018172-20-000037","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-15"},{"end":"2019-12-31","val":6433000,"accn":"0000018172-20-000049","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-14"},{"end":"2019-12-31","val":6433000,"accn":"0000018172-20-000057","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-16"},{"end":"2019-12-31","val":6433000,"accn":"0001558370-21-002392","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2019Q4I"},{"end":"2020-03-31","val":4269000,"accn":"0000018172-20-000037","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-15","frame":"CY2020Q1I"},{"end":"2020-06-30","val":26374000,"accn":"0000018172-20-000049","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-14","frame":"CY2020Q2I"},{"end":"2020-09-30","val":24230000,"accn":"0000018172-20-000057","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-16","frame":"CY2020Q3I"},{"end":"2020-12-31","val":22444000,"accn":"0001558370-21-002392","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-04","frame":"CY2020Q4I"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect","description":"Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. 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Method Investment, Other than Temporary Impairment","description":"This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.","units":{"USD":[{"start":"2016-01-01","end":"2016-06-30","val":4636000,"accn":"0000018172-16-000094","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"start":"2016-04-01","end":"2016-06-30","val":4636000,"accn":"0000018172-17-000067","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q2"},{"start":"2016-04-01","end":"2016-06-30","val":4636000,"accn":"0000018172-17-000051","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"start":"2016-04-01","end":"2016-06-30","val":4636000,"accn":"0000018172-16-000094","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"start":"2016-01-01","end":"2016-09-30","val":4636000,"accn":"0000018172-16-000102","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-09"},{"start":"2016-01-01","end":"2016-12-31","val":4636000,"accn":"0000018172-17-000021","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-15","frame":"CY2016"},{"start":"2016-01-01","end":"2016-12-31","val":4636000,"accn":"0000018172-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-04-07"}]}},"EquityMethodInvestmentOwnershipPercentage":{"label":"Equity Method Investment, Ownership Percentage","description":"The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.","units":{"pure":[{"end":"2012-12-31","val":0.5,"accn":"0000018172-13-000012","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-11","frame":"CY2012Q4I"},{"end":"2013-03-31","val":0.5,"accn":"0000018172-13-000024","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":0.5,"accn":"0000018172-13-000038","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-07-31","frame":"CY2013Q2I"},{"end":"2013-09-30","val":0.5,"accn":"0000018172-13-000053","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-01","frame":"CY2013Q3I"},{"end":"2013-12-31","val":0.5,"accn":"0000018172-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-07","frame":"CY2013Q4I"},{"end":"2014-03-31","val":0.5,"accn":"0000018172-14-000022","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-01","frame":"CY2014Q1I"},{"end":"2014-06-30","val":0.5,"accn":"0000018172-14-000032","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-11","frame":"CY2014Q2I"},{"end":"2014-09-30","val":0.5,"accn":"0000018172-14-000040","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-10-29","frame":"CY2014Q3I"},{"end":"2014-12-31","val":0.5,"accn":"0000018172-15-000007","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-09","frame":"CY2014Q4I"},{"end":"2015-03-31","val":0.5,"accn":"0000018172-15-000022","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-04-30","frame":"CY2015Q1I"},{"end":"2015-06-30","val":0.5,"accn":"0000018172-15-000039","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06","frame":"CY2015Q2I"},{"end":"2015-09-30","val":0.5,"accn":"0000018172-15-000050","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-09","frame":"CY2015Q3I"},{"end":"2015-12-31","val":0.5,"accn":"0000018172-16-000067","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15"},{"end":"2015-12-31","val":0.5,"accn":"0000018172-16-000084","fy":2015,"fp":"FY","form":"8-K","filed":"2016-05-26","frame":"CY2015Q4I"},{"end":"2016-03-31","val":0.5,"accn":"0000018172-16-000076","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":0.5,"accn":"0000018172-16-000094","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2016-06-30","val":0.5,"accn":"0000018172-16-000102","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-09"},{"end":"2016-06-30","val":0.5,"accn":"0000018172-17-000021","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-15"},{"end":"2016-06-30","val":0.5,"accn":"0000018172-17-000051","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":0.5,"accn":"0000018172-17-000067","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-14","frame":"CY2016Q3I"},{"end":"2016-12-31","val":0.5,"accn":"0000018172-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-04-07","frame":"CY2016Q4I"}]}},"EquityMethodInvestmentRealizedGainLossOnDisposal":{"label":"Equity 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This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses 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