Debt - Senior Unsecured Notes (Details) - USD ($) |
Aug. 18, 2016 |
Mar. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|---|
| Debt Instrument [Line Items] | |||
| Unamortized deferred financing costs | $ 35,086,000 | $ 37,111,000 | |
| Unsecured Debt | |||
| Debt Instrument [Line Items] | |||
| Aggregate principal amount of debt | $ 300,000,000 | 420,000,000 | |
| Principal amount issued (as a percent) | 99.378% | ||
| Proceeds from issuance of debt | $ 296,200,000 | ||
| Stated interest rate (as a percent) | 4.45% | ||
| Deferred financing costs | $ 3,200,000 | 4,800,000 | |
| Unamortized deferred financing costs | $ 3,100,000 | $ 3,100,000 | |
| Period Prior to June 15, 2026 | Senior Unsecured Notes | |||
| Debt Instrument [Line Items] | |||
| Redemption price, percent of principal amount (as a percent) | 100.00% |