Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill And Other Intangible Assets [Line Items]
Discrete forecast period	5 years
Goodwill impairment	$ 0	$ 0	$ 14,510,000
Amortization of intangible assets	800,000	700,000	700,000
Estimated remaining amortization expense, 2016	600,000
Estimated remaining amortization expense, 2017	300,000
Estimated remaining amortization expense, 2018	300,000
Estimated remaining amortization expense, 2019	300,000
Estimated remaining amortization expense, 2020	200,000
Estimated remaining amortization expense, thereafter	200,000
Impairment expense	$ 0	$ 0	0
Operating Segments | Government Solutions
Goodwill And Other Intangible Assets [Line Items]
Goodwill impairment			14,510,000
Goodwill related tax benefit			$ 5,200,000