XML 93 R76.htm IDEA: XBRL DOCUMENT v3.3.1.900
FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Changes in Level 3 (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 2,683,745 $ 0
Transfer from level 2 86,576 1,422,996
Purchases 720,010 2,121,503
Sales (839,868) (692,306)
Paydowns/maturities (160,612) (155,525)
Amortization of premium/discount (70,763) (60,992)
Unrealized gain/(loss) (36,610) 19,769
Realized gain/(loss) on sale 24,739 28,300
Ending balance $ 2,407,217 $ 2,683,745