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 | ||||||||||