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Forfeited","description":"Number of shares related to Restricted Stock Award forfeited during the period.","units":{"shares":[{"start":"2015-01-01","end":"2015-06-30","val":8000,"accn":"0001104659-15-059597","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":9612,"accn":"0001104659-15-078645","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-13"},{"start":"2015-01-01","end":"2015-12-31","val":9612,"accn":"0001104659-16-107146","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-23"},{"start":"2015-01-01","end":"2015-12-31","val":9612,"accn":"0001104659-16-120688","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-13"},{"start":"2015-01-01","end":"2015-12-31","val":9612,"accn":"0001104659-16-139169","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015"}]}},"StockIssuedDuringPeriodSharesShareBasedCompensation":{"label":"Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture","description":"Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).","units":{"shares":[{"start":"2015-01-01","end":"2015-09-30","val":863,"accn":"0001104659-15-078645","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-13"},{"start":"2015-01-01","end":"2015-12-31","val":863,"accn":"0001104659-16-107146","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-23"},{"start":"2015-01-01","end":"2015-12-31","val":863,"accn":"0001104659-16-120688","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-13"},{"start":"2015-01-01","end":"2015-12-31","val":863,"accn":"0001104659-16-139169","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015"}]}},"StockIssuedDuringPeriodSharesStockOptionsExercised":{"label":"Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period","description":"Number of share options (or share units) exercised during the current period.","units":{"shares":[{"start":"2015-01-01","end":"2015-09-30","val":4200,"accn":"0001104659-15-078645","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-13"},{"start":"2015-01-01","end":"2015-12-31","val":4200,"accn":"0001104659-16-107146","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-23"},{"start":"2015-01-01","end":"2015-12-31","val":4200,"accn":"0001104659-16-120688","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-13"},{"start":"2015-01-01","end":"2015-12-31","val":4200,"accn":"0001104659-16-139169","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015"}]}},"StockIssuedDuringPeriodValueNewIssues":{"label":"Stock Issued During Period, Value, New Issues","description":"Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.","units":{"USD":[{"start":"2013-10-08","end":"2013-10-09","val":14100000,"accn":"0001104659-14-022986","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-26"},{"start":"2013-01-01","end":"2013-12-31","val":12849000,"accn":"0001104659-14-022986","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-26"},{"start":"2013-01-01","end":"2013-12-31","val":12849000,"accn":"0001104659-14-061901","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-19"},{"start":"2013-01-01","end":"2013-12-31","val":12849000,"accn":"0001104659-14-080382","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-13"},{"start":"2013-01-01","end":"2013-12-31","val":12849000,"accn":"0001104659-15-023137","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-26","frame":"CY2013"}]}},"StockIssuedDuringPeriodValueShareBasedCompensation":{"label":"Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture","description":"Value, after forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":79000,"accn":"0001104659-15-023137","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-26"},{"start":"2014-01-01","end":"2014-12-31","val":79000,"accn":"0001104659-15-038165","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-12-31","val":79000,"accn":"0001104659-15-059597","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-12-31","val":79000,"accn":"0001104659-15-078645","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":79000,"accn":"0001104659-16-107146","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-23","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":34000,"accn":"0001104659-15-038165","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":66000,"accn":"0001104659-15-059597","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":95000,"accn":"0001104659-15-078645","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-13"},{"start":"2015-01-01","end":"2015-12-31","val":126000,"accn":"0001104659-16-107146","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-23"},{"start":"2015-01-01","end":"2015-12-31","val":126000,"accn":"0001104659-16-120688","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-13"},{"start":"2015-01-01","end":"2015-12-31","val":126000,"accn":"0001104659-16-139169","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":33000,"accn":"0001104659-16-120688","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-13","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":66000,"accn":"0001104659-16-139169","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"}]}},"StockOptionPlanExpense":{"label":"Stock or Unit Option Plan Expense","description":"Amount of noncash expense for option under share-based payment arrangement.","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":-16000,"accn":"0001104659-15-023137","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-26"},{"start":"2014-01-01","end":"2014-12-31","val":-16000,"accn":"0001104659-15-038165","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14"},{"start":"2014-01-01","end":"2014-12-31","val":-16000,"accn":"0001104659-15-059597","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2014-01-01","end":"2014-12-31","val":-16000,"accn":"0001104659-15-078645","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-13"},{"start":"2014-01-01","end":"2014-12-31","val":-16000,"accn":"0001104659-16-107146","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-23","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":-7000,"accn":"0001104659-15-038165","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-14","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":-14000,"accn":"0001104659-15-059597","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-13"},{"start":"2015-01-01","end":"2015-09-30","val":-20000,"accn":"0001104659-15-078645","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-13"},{"start":"2015-01-01","end":"2015-12-31","val":-26000,"accn":"0001104659-16-107146","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-23"},{"start":"2015-01-01","end":"2015-12-31","val":-26000,"accn":"0001104659-16-120688","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-13"},{"start":"2015-01-01","end":"2015-12-31","val":-26000,"accn":"0001104659-16-139169","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-6000,"accn":"0001104659-16-120688","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-13","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-13000,"accn":"0001104659-16-139169","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-12"}]}},"StockRepurchasedDuringPeriodShares":{"label":"Stock Repurchased During Period, Shares","description":"Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. 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Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury 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