Derivative Instruments (Details) - Not Designated as Hedging Instrument - USD ($)
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12 Months Ended |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
| Interest rate derivatives - caps |
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| Derivative [Line Items] |
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|
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| Notional amount (in thousands) |
$ 882,500,000
|
$ 779,000,000
|
|
| Aggregate principal balance on corresponding mortgage loans (in thousands) |
$ 857,000,000
|
$ 779,000,000
|
|
| Interest rate derivatives - caps | Minimum |
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| Derivative [Line Items] |
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|
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| Strike rate |
0.75%
|
3.00%
|
|
| Interest rate derivatives - caps | Maximum |
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| Derivative [Line Items] |
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|
|
| Strike rate |
4.00%
|
4.00%
|
|
| Interest rate derivatives - caps |
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|
|
| Derivative [Line Items] |
|
|
|
| Notional amount (in thousands) |
$ 882,500,000
|
$ 602,500,000
|
$ 391,000,000
|
| Total cost of interest rate caps (in thousands) |
$ 200,000
|
$ 92,000
|
$ 115,000
|
| Interest rate derivatives - caps | Minimum |
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|
|
| Derivative [Line Items] |
|
|
|
| Strike rate |
0.75%
|
3.00%
|
3.00%
|
| Interest rate derivatives - caps | Maximum |
|
|
|
| Derivative [Line Items] |
|
|
|
| Strike rate |
4.00%
|
4.00%
|
7.80%
|
| Interest rate derivatives - floors |
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|
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| Derivative [Line Items] |
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|
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| Notional amount (in thousands) |
$ 0
|
$ 0
|
$ 2,000,000,000
|
| Total cost of interest rate caps (in thousands) |
$ 0
|
$ 0
|
$ 75,000
|
| Interest rate derivatives - floors | Minimum |
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| Derivative [Line Items] |
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|
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| Strike rate |
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|
1.63%
|
| Interest rate derivatives - floors | Maximum |
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|
|
| Derivative [Line Items] |
|
|
|
| Strike rate |
|
|
1.63%
|