CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss):	$ 2,758	$ (156)	$ 771	$ 417,441
Other comprehensive (loss) income:
Net unrealized gains (loss) related to available-for-sale securities	3,710	(3,202)	6,956	(3,480)
Reclassification of other-than-temporary impairment losses included in earnings	0	1,295	0	1,295
Reclassification of realized (gains) losses included in earnings	(5,276)	0	(5,276)	833
Income tax	1,057	734	(216)	519
Total	(509)	(1,173)	1,464	(833)
Defined benefit pension items:
Net loss (gain) arising during the period	0	94	0	(502)
Settlement included in net periodic cost	0	529	0	969
Amortization of loss included in net periodic cost	0	115	0	373
Income tax	0	(284)	0	(324)
Total	0	454	0	516
Total other comprehensive (loss) income, net of tax	(509)	(719)	1,464	(317)
Total comprehensive income (loss), net of tax	$ 2,249	$ (875)	$ 2,235	$ 417,124