Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Intangible assets
Intangible assets, gross	$ 137,755		$ 137,755		$ 137,755
Less: Accumulated amortization	(73,331)		(73,331)		(63,177)
Intangible assets, net	64,424		64,424		74,578
Amortization of intangibles
Remainder of 2015	10,116		10,116
2016	19,933		19,933
2017	16,613		16,613
2018	15,993		15,993
2019	1,582		1,582
Thereafter	187		187
Amortization expense	5,100	$ 5,200	10,154	$ 10,293
Customer Relationships
Intangible assets
Intangible assets, gross	102,755		102,755		102,755
Less: Accumulated amortization	(51,115)		(51,115)		(44,020)
Intangible assets, net	51,640		51,640		58,735
Restrictive Covenant
Intangible assets
Intangible assets, gross	18,000		18,000		18,000
Less: Accumulated amortization	(13,224)		(13,224)		(11,394)
Intangible assets, net	4,776		4,776		6,606
Trade Names
Intangible assets
Intangible assets, gross	17,000		17,000		17,000
Less: Accumulated amortization	(8,992)		(8,992)		(7,763)
Intangible assets, net	$ 8,008		$ 8,008		$ 9,237
Minimum | Customer Relationships
Intangible assets
Useful Life			5 years		5 years
Minimum | Restrictive Covenant
Intangible assets
Useful Life			3 years		3 years
Minimum | Trade Names
Intangible assets
Useful Life			3 years		3 years
Maximum | Customer Relationships
Intangible assets
Useful Life			10 years		10 years
Maximum | Restrictive Covenant
Intangible assets
Useful Life			7 years		7 years
Maximum | Trade Names
Intangible assets
Useful Life			5 years		5 years