Schedule I - Condensed Financial Information of the Registrant (Parent Company Only) Cash Flows Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities:
Cash used in operating activities	$ (48,923)	$ (148,092)	$ (58,564)
Investing activities:
Proceeds from the sale of investments	7,938	31,036	22,676
Purchases of debt and equity securities	(2,316)	(11,046)	(20,290)
Purchases of property, plant and equipment	(3,108)	(5,270)	(3,568)
Net cash provided by (used in) investing activities	106,593	(4,892)	$ 2,722
Financing activities:
Payment of withholding taxes on exercise of restricted stock units	(496)	(5,737)
Cash used in financing activities	(63,248)	76,027	$ 94,165
Net increase (decrease) in cash and cash equivalents	(5,578)	(75,061)	37,924
Cash and cash equivalents, beginning of year	62,978	138,039	100,115
Cash and cash equivalents, end of year	57,400	62,978	138,039
Supplemental disclosure of cash flow information:
Payment (refund) of federal and state income taxes	(67)	(3,817)	185
Non-cash investing and financing activities:
Issuance of common stock for vested restricted stock units	1,609	11,463
Parent Company
Operating activities:
Cash used in operating activities	(5,997)	(3,439)	(14,823)
Investing activities:
Proceeds from the sale of investments	$ 10,153	6,027	3,162
Purchases of debt and equity securities		(264)	(1,144)
Purchases of and advances to subsidiaries	$ (18,563)	(8,376)	(35,118)
Cash received from the repayment of loans and advances to subsidiaries	$ 12,496	8,909	$ 4,348
Dividends received from subsidiaries		12,088
Purchases of property, plant and equipment	$ (8)	$ (39)	$ (37)
Cash received for sale of property, plant and equipment			24
Net cash provided by (used in) investing activities	4,078	$ 18,345	$ (28,765)
Financing activities:
Payment of withholding taxes on exercise of restricted stock units	(126)	(4,118)
Cash used in financing activities	(126)	(4,118)	$ 0
Net increase (decrease) in cash and cash equivalents	(2,045)	10,788	(43,588)
Cash and cash equivalents, beginning of year	13,474	2,686	46,274
Cash and cash equivalents, end of year	11,429	13,474	$ 2,686
Supplemental disclosure of cash flow information:
Payment (refund) of federal and state income taxes	(3)	(4,127)
Non-cash investing and financing activities:
Issuance of common stock for vested restricted stock units	$ 559	7,464
Dividend received from subsidiaries		$ 62,600