Income Taxes - Unrecognized Tax Benefits - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	$ 4,800,000
Income tax benefit	9,601,000	35,685,000	27,060,000
Unrecognized tax benefits that, if recognized, would affect the effective tax rate	0	6,600,000	2,600,000
Interest expense (benefit) on unrecognized income tax benefits	(500,000)	100,000	200,000
Interest on income taxes accrued	0	500,000
Increased Domestic Production Deduction due to Inclusion of CBPC Income [Member]
Income Tax Contingency [Line Items]
Significant change in unrecognized tax benefits expected		4,800,000
Unrecognized Tax Benefits Included in the Reserve Decrease Resulting from Settlements with Taxing Authorities	900,000
Settlement with Taxing Authority [Member]
Income Tax Contingency [Line Items]
Significant change in unrecognized tax benefits expected		5,800,000
Significant change in unrecognized tax benefits, nature of event	positions on the Company’s 2010 tax return, on which the statute of limitations on examination expired during 2014
Unrecognized Tax Benefits, Decrease Resulting from Lapse of Statute of Limitations	5,800,000
Income tax benefit	1,800,000
Decrease in deferred tax asset, non-current	$ 4,000,000