Summary of Significant Accounting Policies (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Intangible assets, net
Balance at the beginning	$ 81,552
Additions - S&R Acquisition	7,600
Amortization	(3,211)
Balance at the end	85,941
Expected amortization of the intangible assets for each of the five succeeding years
2014	3,584
2015	3,584
2016	3,584
2017	3,509
2018	3,359
Minimum
Intangible assets, net
Estimated useful lives	4 years
Maximum
Intangible assets, net
Estimated useful lives	30 years
Customer relationships
Intangible assets, net
Balance at the beginning	67,200
Additions - S&R Acquisition	6,700
Amortization	(2,512)
Balance at the end	71,388
Trade names
Intangible assets, net
Balance at the beginning	14,352
Amortization	(624)
Balance at the end	13,728
Non-compete
Intangible assets, net
Additions - S&R Acquisition	900
Amortization	(75)
Balance at the end	$ 825