Other Intangible Assets, Net (Schedule of Finite-Lived Intangible Assets by Major Class) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	$ 493,172		$ 493,172		$ 496,899
Less accumulated amortization	(236,861)		(236,861)		(218,629)
Total	256,311		256,311		278,270
Amortization expense for finite-lived intangible assets	9,800	$ 10,000	19,600	$ 17,600
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	391,040		391,040		394,070
Less accumulated amortization	(206,033)		(206,033)		(192,612)
Total	185,007		185,007		201,458
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	9,319		9,319		9,332
Less accumulated amortization	(7,670)		(7,670)		(7,351)
Total	1,649		1,649		1,981
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	92,813		92,813		93,497
Less accumulated amortization	(23,158)		(23,158)		(18,666)
Total	$ 69,655		$ 69,655		$ 74,831