CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 14,609	$ 2,698	$ 417,597	$ 221
Other comprehensive income:
Net unrealized gains (losses) on available-for-sale investments	941	(891)	555	(891)
Income tax benefit	(364)	0	(214)	0
Total	577	(891)	341	(891)
Defined benefit pension items:
Net (loss) gain arising during the period	(187)	2,013	(596)	2,013
Settlement included in net periodic cost	200	394	440	394
Amortization of loss included in net periodic cost	125	101	257	198
Income tax benefit	(53)	0	(40)	0
Total	85	2,508	61	2,605
Total other comprehensive income, net of tax	662	1,617	402	1,714
Total comprehensive income, net of tax	$ 15,271	$ 4,315	$ 417,999	$ 1,935