Other Operating Income (Expense) - Additional Information (Detail) - USD ($) $ 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 |
|
| Component Of Other Income And Expense [Abstract] | |||||||||||
| Insurance recoveries | $ 200 | $ 100 | $ 300 | $ 3,100 | $ 400 | $ 8,800 | $ 400 | $ 800 | $ 3,657 | $ 10,368 | $ 9,427 |