Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Oct. 02, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 09, 2011
Goodwill And Intangible Assets Disclosure [Abstract]
2014		$ 3,800,000
2015		3,100,000
2016		2,300,000
2017		600,000
2018		400,000
Thereafter		2,000,000
Weighted average estimated remaining amortization period		5 years 4 months 24 days
Acquisition of assets	700,000
Fair value of contingent liability		500,000	400,000
Purchases	200,000
Acquisition of goodwill recorded value	500,000
Intangible assets estimated useful life in year	5 years
Estimated fair value of contracts acquired		356,000	560,000	3,068,000	2,900,000
Transaction costs					$ 100,000