Income Taxes - Effective Income Tax Rate Reconcilliation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Federal income tax at statutory rates	$ (21,260)	$ (5,439)	$ (5,115)
State income taxes, net of federal income tax benefits	(1,757)	22	(1,007)
Dividends received deductions	(766)	(766)	0
Convertible debt mark-to-market - non-deductible	0	6,206	1,551
Other permanent differences	(124)	480	662
Federal and state income tax on joint venture	2,670	2,766	4,478
Rate differential on foreign income	812	(1,680)	(726)
Unrecognized tax benefits	0	(557)	(576)
Audit settlements	0	218	0
State rate changes	87	(68)	(478)
Other	543	248	85
Income tax (benefit) expense	$ (19,795)	$ 1,430	$ (1,126)
Effective income tax expense rate	32.60%	(9.20%)	7.70%