Income Taxes - (Details Textual) - USD ($)	3 Months Ended				12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Item Effected [Line Items]
Impairment of goodwill	$ 175,028,000	$ 0	$ 0	$ 0	$ 175,028,000	$ 0	$ 0
Impairment of goodwill, not tax deductible					100,177,000
Tax impact related to the non-deductible portion of the goodwill impairment change					35,062,000
Net deferred tax, Current						(14,899,000)
Net deferred tax, Noncurrent	(19,186,000)				(19,186,000)	(6,905,000)
Deferred tax asset reflecting federal and state net operating losses	243,865,000				243,865,000	154,020,000
Federal net operating losses	617,698,000				$ 617,698,000
Expiration date for federal net operating losses					2028
Unrecognized tax benefits that would affect the effective tax rate	$ 0				$ 0	0	$ 1,428,000
Period for unrecognized tax benefits to increase or decrease					12 months
Interest and penalties related to unrecognized tax benefits					$ 0
Accounting Standards Update 2015-17 [Member]
Item Effected [Line Items]
Net deferred tax, Current						0
Net deferred tax, Noncurrent						$ (21,804,000)