Fair Value Measurements - Schedule of Fair Value of Liabilities (Details) - USD ($)
$ in Thousands |
Mar. 31, 2019 |
Mar. 15, 2019 |
Dec. 31, 2018 |
Nov. 30, 2017 |
| Senior Notes Due 2026 | Senior Notes |
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
|
| Fair value of debt instrument |
$ 391,873
|
|
$ 391,630
|
|
| Interest rate, stated percentage |
5.375%
|
|
|
5.375%
|
| Senior Notes Due 2027 | Senior Notes |
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
|
| Fair value of debt instrument |
$ 488,982
|
|
0
|
|
| Interest rate, stated percentage |
6.875%
|
6.875%
|
|
|
| Fair Value | Senior Notes Due 2026 | Senior Notes |
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
|
| Fair value of debt instrument |
$ 383,000
|
|
372,000
|
|
| Fair Value | Senior Notes Due 2027 | Senior Notes |
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
|
| Fair value of debt instrument |
505,000
|
|
0
|
|
| Revolving Credit Facility | Line of Credit |
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
|
| Fair value of debt instrument |
0
|
|
300,000
|
|
| Revolving Credit Facility | Fair Value | Line of Credit |
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
|
| Fair value of debt instrument |
$ 0
|
|
$ 300,000
|
|