Restructuring - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Facility People	Sep. 30, 2013
Reorganizations [Abstract]
Restructuring charges	$ 1,223	$ 1,126	$ 1,970	$ 1,364
Approximate number of workforce reduction from the company's headcount			111
Number of facilities closing			1
Proceeds from sale of building, net of commissions	$ 1,316