Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$ 6,985	$ 13,925	$ 26,945	$ 24,079
Unrecognized income tax benefits including interest and penalties	7,400		7,400
Tax Adjustments, Settlements, and Unusual Provisions	7,100
Portion of unrecognized income tax benefits, expected to be recognized upon settlement of tax examinations and the expiration of various statutes of limitations within next twelve months	$ 1,200		$ 1,200