Fair Value Measurements - Additional Information (Detail) - USD ($)
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|
9 Months Ended |
12 Months Ended |
Jul. 18, 2013 |
Sep. 30, 2016 |
Dec. 31, 2015 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Carrying amount of senior notes |
|
$ 220,902,000
|
$ 220,375,000
|
| Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |
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|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative liabilities |
|
123,000
|
$ 40,000
|
| Other Asset Class [Member] |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Assets fair value on recurring basis |
|
$ 0
|
|
| 6.625% Senior Notes Due 2021 [Member] | Senior Notes [Member] |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Interest rate |
6.625%
|
6.625%
|
6.625%
|
| Due date |
Jul. 15, 2021
|
Jul. 15, 2021
|
Jul. 15, 2021
|
| Carrying amount of senior notes |
|
$ 220,902,000
|
$ 220,375,000
|
| Estimated fair value of senior notes |
|
$ 201,938,000
|
$ 157,500,000
|