Quarterly Results of Operations - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Pre-tax income related to insurance recoveries	$ 200	$ 100	$ 300	$ 3,100	$ 400	$ 8,800	$ 400	$ 800	$ 3,657	$ 10,368	$ 9,427
Deferred income tax asset valuation allowance loss per share			$ 0.65
Adjustment to the reserve for uncertain tax positions, net				$ 3,000
Uncertain tax positions per share							$ 0.02
Workforce reduction charges loss per share			$ 0.07
Other-than-temporary impairment charge loss per share		$ 0.03