Goodwill and Other Long-Lived Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 182,862	$ 161,616
Accumulated Amortization	(72,433)	(65,279)
Total	110,429	96,337
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,242	10,551
Accumulated Amortization	(4,535)	(4,086)
Total	6,707	6,465
Non-contractual customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	132,741	116,082
Accumulated Amortization	(54,491)	(48,821)
Total	78,250	67,261
Covenants not-to-compete [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,311	12,435
Accumulated Amortization	(5,364)	(4,779)
Total	10,947	7,656
Favorable lease assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,461	9,441
Accumulated Amortization	(5,543)	(5,440)
Total	3,918	4,001
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,377	1,377
Accumulated Amortization	(643)	(589)
Total	734	788
Franchise rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,730	11,730
Accumulated Amortization	(1,857)	(1,564)
Total	$ 9,873	$ 10,166