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Consolidated Statements of Comprehensive Income (Loss) (Audited) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Consolidated Statements of Comprehensive Income (Loss) [Abstract]      
Net income (loss) $ 59,186 $ (2,504) $ 85,181
Other comprehensive income (loss) before tax:      
Unrealized gain (loss) on securities available-for-sale (5,023) (8,814) 19,843
Realized gain on investment securities included in net income (12,207) (2,572) (4,366)
Other Than Temporary Impairment on securities included in net income 0 1,490 0
Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Portion Attributable To Noncontrolling Interest 0   0
Unrealized gain (loss) on cash flow hedges 3,303 4,278 2,322
Other comprehensive income (loss) before taxes (13,927) (5,618) 17,799
Income tax effect 1,526 (96) (1,279)
Other Comprehensive Income (Loss) After taxes (12,401) (5,714) 16,520
Comprehensive income (loss) $ 46,785 $ (8,218) $ 101,701