Goodwill and Intangible Assets - Company's Purchased Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	$ 116,893	$ 118,612
Accumulated Amortization	(40,838)	(26,575)
Net Intangibles	76,055	92,037
Weighted Average Amortization Period (years)	8 years	8 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	102,774	104,483
Accumulated Amortization	(35,873)	(23,552)
Net Intangibles	66,901	80,931
Weighted Average Amortization Period (years)	8 years	8 years
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	11,600	11,600
Accumulated Amortization	(2,803)	(1,451)
Net Intangibles	8,797	10,149
Weighted Average Amortization Period (years)	8 years	8 years
Non-Compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	1,220	1,229
Accumulated Amortization	(1,009)	(681)
Net Intangibles	211	548
Weighted Average Amortization Period (years)	2 years	2 years
Proprietary Software [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	850	850
Accumulated Amortization	(847)	(810)
Net Intangibles	3	40
Weighted Average Amortization Period (years)	2 years	2 years
Favorable Lease Agreement [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	449	450
Accumulated Amortization	(306)	(81)
Net Intangibles	$ 143	$ 369
Weighted Average Amortization Period (years)	2 years	2 years