Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Federal statutory rate	35.00%	35.00%	35.00%
Net operating losses, reduction for cancellation of indebtedness income realized	$ 31,700,000
Valuation allowance	189,200,000
Alternative minimum tax credits	1,900,000
Federal
Income Taxes [Line Items]
Income taxes paid	0	$ 0	$ 601,000
Net operating loss carryforwards	$ 567,500,000
Net operating loss carryforwards, expiration date	Dec. 31, 2031
State
Income Taxes [Line Items]
Operating loss carryforwards, valuation allowance		$ 900,000
Net operating loss carryforwards	$ 226,100,000
Net operating loss carryforwards, expiration date	Dec. 31, 2017