Acquisition - Summary of Acquired Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended
	Feb. 28, 2013
Acquired Intangible Assets [Line Items]
Costs	13,255
Customer Relationships [Member]
Acquired Intangible Assets [Line Items]
Costs	5,455
Customer Relationships [Member] | Minimum [Member]
Acquired Intangible Assets [Line Items]
Estimated life of intangible assets	10 years
Customer Relationships [Member] | Maximum [Member]
Acquired Intangible Assets [Line Items]
Estimated life of intangible assets	15 years
Internally Developed Software [Member]
Acquired Intangible Assets [Line Items]
Costs	5,000
Estimated life of intangible assets	3 years
Tradenames - Finite Life [Member]
Acquired Intangible Assets [Line Items]
Costs	300
Estimated life of intangible assets	3 years
Non-Competition Agreements [Member]
Acquired Intangible Assets [Line Items]
Costs	380
Estimated life of intangible assets	3 years
Tradename - Indefinite Life [Member]
Acquired Intangible Assets [Line Items]
Costs	1,820
Other [Member]
Acquired Intangible Assets [Line Items]
Costs	300