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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Statement of Comprehensive Income [Abstract]      
Net income $ 229,824 $ 12,024 $ 11,420
Unrealized net gain on available-for-sale securities, net of tax 1,933 3,872 2,914
Less:Reclassification of net realized gains included in net income, net of tax (1,965) (1,833)  
Comprehensive income $ 229,792 $ 14,063 $ 14,334