Income Taxes (Deferred Tax Liabilities (Assets)) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Depreciation	$ 18,667	$ 18,896
Goodwill	36,058	29,175
Intangible assets	19,291	18,637
Other	1,742	1,464
Deferred Tax Liabilities, Gross	75,758	68,172
Equity compensation	(13,023)	(11,826)
Other	(20,847)	(16,988)
Gross deferred tax assets	(33,870)	(28,814)
Valuation allowances	766	400
Deferred tax assets, net of valuation allowances	(33,104)	(28,414)
Gross deferred tax liabilities	$ 42,654	$ 39,758