Other Intangible Assets, Net (Schedule of Finite-Lived Intangible Assets by Major Class) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	$ 546,248		$ 546,248		$ 496,899
Less accumulated amortization	(244,058)		(244,058)		(218,629)
Total	302,190		302,190		278,270
Amortization expense for finite-lived intangible assets	9,400	$ 10,200	28,900	$ 27,800
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	440,692		440,692		394,070
Less accumulated amortization	(211,085)		(211,085)		(192,612)
Total	229,607		229,607		201,458
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	9,308		9,308		9,332
Less accumulated amortization	(7,825)		(7,825)		(7,351)
Total	1,483		1,483		1,981
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	91,948		91,948		93,497
Less accumulated amortization	(25,148)		(25,148)		(18,666)
Total	66,800		66,800		74,831
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	4,300		4,300		0
Less accumulated amortization					0
Total	$ 4,300		$ 4,300		$ 0