Income Taxes Additional Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal	$ (19,770,000)	$ 0	$ 64,443,000	$ 0
State	(31,000)	0	129,000	0
Current Income Tax Expense (Benefit)	(19,801,000)	0	64,572,000	0
Federal	28,415,000	(6,000)	40,459,000	(6,000)
State	76,000	6,000	10,563,000	6,000
Deferred Income Tax Expense (Benefit)	28,491,000	0	51,022,000	0
Income Tax Expense (Benefit)	8,690,000	0	115,594,000	0
Operating Loss Carryforwards [Line Items]
Deferred tax assets, valuation allowance	5,789,000		5,789,000		95,953,000
Deferred tax liabilities	40,100,000		40,100,000		0
Deferred tax asset	0		0		12,866,000
Decrease in valuation allowance	(864,000)	(907,000)	(90,164,000)	(100,000)
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, amount utilized			76,800,000
Operating loss carryforwards	0		0
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, amount utilized			314,100,000
Operating loss carryforwards	337,100,000		337,100,000
Adjustments for New Accounting Pronouncement
Operating Loss Carryforwards [Line Items]
Reduction to Accrued liabilities and deferred credits	1,700,000		1,700,000
AgReserves Sale
Operating Loss Carryforwards [Line Items]
Total before tax			502,600,000
Sales of real estate, gain recorded on sale, taxable, deferred	179,900,000		179,900,000
Deferred income, term			15 years
Deferred tax liabilities, gross	$ 69,200,000		$ 69,200,000