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Debt - Long-term Debt (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Feb. 29, 2016
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 2,517,216,000 | $ 2,981,062,000 |  |
Unamortized discount on exchangeable senior notes | (895,000) | (1,883,000) |  |
Equity component of exchangeable senior notes | (2,408,000) | (4,969,000) |  |
Deferred financing costs, net | (38,026,000) | (51,636,000) |  |
Total debt per balance sheet | 2,475,887,000 | 2,922,574,000 |  |
Amortization of debt issuance costs | $ 8,163,000 | 10,475,000 | $ 8,305,000 |
Convertible Debt | 3.25% Exchangeable Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 3.25% |  |  | 3.25%
Total debt | $ 115,000,000 | 115,000,000 |  |
Unamortized discount on exchangeable senior notes |  |  |  | $ (2,700,000)
Equity component of exchangeable senior notes |  |  |  | $ (7,000,000)
Line of Credit | Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 2.76% |  |  |
Total debt | $ 140,000,000 | 0 |  |
Credit facility maximum borrowing capacity | $ 800,000,000 |  |  |
Line of Credit | Revolving Credit Facility | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 1.20% |  |  |
Line of Credit | Revolving Credit Facility | Minimum | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 0.825% |  |  |
Line of Credit | Revolving Credit Facility | Minimum | Base Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 0.00% |  |  |
Line of Credit | Revolving Credit Facility | Maximum | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 1.55% |  |  |
Line of Credit | Revolving Credit Facility | Maximum | Base Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 0.55% |  |  |
Line of Credit | Term loan facility, net |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 2.91% |  |  |
Total debt | $ 200,000,000 | 325,000,000 |  |
Deferred financing costs, net | (2,000,000) | (3,300,000) |  |
Credit facility maximum borrowing capacity | $ 200,000,000 |  |  |
Line of Credit | Term loan facility, net | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 1.35% |  |  |
Line of Credit | Term loan facility, net | Minimum | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 0.90% |  |  |
Line of Credit | Term loan facility, net | Minimum | Base Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 0.00% |  |  |
Line of Credit | Term loan facility, net | Maximum | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 1.75% |  |  |
Line of Credit | Term loan facility, net | Maximum | Base Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 0.75% |  |  |
Secured Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 2,013,357,000 | 2,491,234,000 |  |
Amortization of debt issuance costs | 6,400,000 | 8,500,000 | $ 7,000,000 |
Secured Debt | 2014-SFR 1 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 0 | 456,074,000 |  |
Secured Debt | 2014-SFR 2 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.42% |  |  |
Total debt | $ 496,326,000 | 501,810,000 |  |
Secured Debt | 2014-SFR 3 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.40% |  |  |
Total debt | $ 512,041,000 | 517,827,000 |  |
Secured Debt | 2015-SFR 1 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.14% |  |  |
Total debt | $ 537,723,000 | 543,480,000 |  |
Secured Debt | 2015-SFR 2 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.36% |  |  |
Total debt | $ 467,267,000 | 472,043,000 |  |
Secured Debt | Notes Payable |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 4.06% |  |  |
Total debt | $ 48,859,000 | $ 49,828,000 |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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