Income Taxes (Schedule of Income Tax Benefit (Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Federal Income Tax Expense (Benefit)	$ (47,723)	$ (28,719)	$ (14,468)
Deferred State Income Tax Expense (Benefit)	(1,964)	(1,181)	(354)
Deferred Income Tax Expense (Benefit), Total	(49,687)	(29,900)	(14,822)
Federal Income Tax Expense (Benefit)	(47,723)	(28,719)	(14,468)
State Income Tax Expense (Benefit)	(1,964)	(1,181)	(354)
Total provision for income taxes	(49,687)	(29,900)	(14,822)
Parent Company [Member]
Deferred Income Tax Expense (Benefit), Total	$ (42,982)	$ (20,270)	$ (6,172)