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Fair Value - Carrying Value and Fair Value (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Dec. 31, 2018 | Oct. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Deferred financing costs, net | $ 36,332,000 |  |  | $ 36,332,000 | $ 36,421,000 |
Gain on derivative recorded in other comprehensive income |  |  |  | 9,600,000 |  |
Estimated amount of existing gains to be reclassified in the next 12 months | 1,000,000.0 |  |  | 1,000,000.0 |  |
Redemptions of Class A units | 0 | $ 0 | $ (28,258,000) |  |  |
Treasury Lock | Designated as Hedging Instrument |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  | $ 350,000,000.0
Accumulated deficit |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Redemptions of Class A units |  |  | $ 32,215,000 |  |  |
Asset-backed securitization |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Deferred financing costs, net |  |  |  |  | 31,000,000.0 |
Term Loan facility | Line of Credit |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Deferred financing costs, net |  |  |  |  | 800,000 |
Unsecured Senior Notes |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Deferred financing costs, net |  |  |  |  | 4,700,000 |
Carrying Value |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Asset-backed securitization | 1,953,280,000 |  |  | 1,953,280,000 | 1,961,511,000 |
Unsecured senior notes, net | 887,777,000 |  |  | 887,777,000 | 492,800,000 |
Revolving credit facility | 0 |  |  | 0 | 250,000,000 |
Term loan facility | 0 |  |  | 0 | 99,232,000 |
Total debt | 2,841,057,000 |  |  | 2,841,057,000 | 2,803,543,000 |
Carrying Value | 2014-SFR 2 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Asset-backed securitization | 481,749,000 |  |  | 481,749,000 | 483,790,000 |
Carrying Value | 2014-SFR 3 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Asset-backed securitization | 497,106,000 |  |  | 497,106,000 | 499,108,000 |
Carrying Value | 2015-SFR 1 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Asset-backed securitization | 521,771,000 |  |  | 521,771,000 | 523,865,000 |
Carrying Value | 2015-SFR 2 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Asset-backed securitization | 452,654,000 |  |  | 452,654,000 | 454,748,000 |
Carrying Value | 4.25% Senior Notes Due 2028 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Unsecured senior notes, net | 493,195,000 |  |  | 493,195,000 | 492,800,000 |
Carrying Value | 4.90% Senior Notes Due 2029 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Unsecured senior notes, net | 394,582,000 |  |  | 394,582,000 | 0 |
Fair Value |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Asset-backed securitization | 2,009,790,000 |  |  | 2,009,790,000 | 2,008,239,000 |
Unsecured senior notes, net | 952,368,000 |  |  | 952,368,000 | 479,730,000 |
Revolving credit facility | 0 |  |  | 0 | 250,000,000 |
Term loan facility | 0 |  |  | 0 | 100,000,000 |
Total debt | 2,962,158,000 |  |  | 2,962,158,000 | 2,837,969,000 |
Fair Value | 2014-SFR 2 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Asset-backed securitization | 493,762,000 |  |  | 493,762,000 | 494,820,000 |
Fair Value | 2014-SFR 3 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Asset-backed securitization | 512,386,000 |  |  | 512,386,000 | 511,450,000 |
Fair Value | 2015-SFR 1 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Asset-backed securitization | 535,892,000 |  |  | 535,892,000 | 534,666,000 |
Fair Value | 2015-SFR 2 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Asset-backed securitization | 467,750,000 |  |  | 467,750,000 | 467,303,000 |
Fair Value | 4.25% Senior Notes Due 2028 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Unsecured senior notes, net | 517,880,000 |  |  | 517,880,000 | 479,730,000 |
Fair Value | 4.90% Senior Notes Due 2029 |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |
Unsecured senior notes, net | $ 434,488,000 |  |  | $ 434,488,000 | $ 0 |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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