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 (loss)	$ 6,914	$ 150,458	$ (1,483)
Other comprehensive income (loss):
Unrealized holdings gains (losses) arising during the period on available-for-sale securities	(3,496)	19,530	(26,703)
Tax effect	1,337	(7,470)	10,256
Unrealized holdings gains (losses) arising during the period on available-for-sale securities, net of tax	(2,159)	12,060	(16,447)
Reclassification adjustment for gain on available-for-sale securities included in net income (loss)	0	(974)	(2,772)
Tax effect	0	373	1,093
Reclassification adjustment for gain on available-for-sale securities included in net income (loss), net of tax	0	(601)	(1,679)
Unrealized loss on interest rate swaps	(241)	(537)	0
Tax effect	92	206	0
Unrealized loss on interest rate swaps, net of tax	(149)	(331)	0
Reclassification adjustment for loss on interest rate swaps included in net income (loss)	12	12	0
Tax effect	(5)	(5)	0
Reclassification adjustment for loss on interest rate swaps included in net income, net of tax	7	7	0
Reclassification adjustment for net actuarial gain (amortization) on pension and post retirement liability	622	382	(302)
Tax effect	(238)	(146)	115
Net actuarial gain (amortization) on pension and post retirement liability, net of tax	384	236	(187)
Change in pension and post retirement liability	(2,181)	(2,010)	1,690
Tax effect	834	769	(659)
Change in pension and post-retirement liability, net of tax	(1,347)	(1,241)	1,031
Other comprehensive income (loss), net of tax	(3,264)	10,130	(17,282)
Comprehensive income (loss)	$ 3,650	$ 160,588	$ (18,765)