Income Taxes (Deferred Tax Liabilities (Assets)) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Depreciation	$ 19,278	$ 20,116
Goodwill	33,982	28,130
Intangible assets	20,951	22,587
Other	1,466	1,680
Gross deferred tax liabilities	75,677	72,513
Equity compensation	(12,858)	(9,897)
Other	(15,623)	(15,975)
Gross deferred tax assets	(28,481)	(25,872)
Valuation allowances	306	2,574
Deferred tax assets, net of valuation allowances	(28,175)	(23,298)
Net deferred tax liabilities	$ 47,502	$ 49,215