Fair Value Measurements - Additional Information (Detail) - USD ($) |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
May 09, 2016 |
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Senior notes fair value basis for measurement, description | The fair value of our $250.0 million aggregate principal amount of 5.875% senior notes due July 1, 2024 (the “Senior Notes” or “2024 Notes”) is based on their latest sales price at the end of each period obtained from a third-party institution and is Level 2 in the fair value hierarchy as there is not an active market for these Senior Notes. | ||
| Senior Notes 5.875 Percent Due 2024 | |||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Senior notes, face amount | $ 250,000,000 | $ 250,000,000 | |
| Debt instrument interest rate | 5.875% | 5.875% | |
| Senior notes due, date | Jul. 01, 2024 |