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Quarterly Results of Operations (Unaudited) - Schedule of Quarterly Results of Operations (Unaudited) (Footnote) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Quarterly Results of Operations [Line Items]                  
Gains (losses) on sale of mortgage servicing rights $ (14,000) $ 41,200 $ 30,300 $ 26,400     $ 83,921 $ 0 $ 0
Goodwill impairment loss         $ 420,200   $ 0 $ 420,201 $ 0
Unfavorable Regulatory Action [Member] | New York Department of Financial Services [Member]                  
Quarterly Results of Operations [Line Items]                  
Losses related to regulatory settlement         $ 50,000 $ 100,000