Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Valuation allowance	$ 37,044,000	$ 39,310,000
Provision for workers' compensation claims threshold	$ 500,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Amortized life assigned to identifiable intangible assets (in years)	2 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Amortized life assigned to identifiable intangible assets (in years)	5 years