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Common Stock (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2021 | Sep. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shelf registration, shares issued (in shares) |  | 7,000,000 |  |  |
Shelf registration, price per share (in dollars per share) |  | $ 56.50 |  |  |
Shelf registration, net proceeds |  | $ 379,410,000 |  |  |
Total allowable shares (in shares) |  |  | 375,000,000 | 375,000,000 |
Total shares issued (in shares) |  |  | 175,635,792 | 175,232,971 |
Shares of common stock (in shares) |  |  |  |  | 7,000,000
Net proceeds |  |  |  |  | $ 395,500,000
Stock issuance costs |  | $ 16,090,000 | $ 325,000 | $ 2,223,000 | 17,521,000
Net proceeds |  |  | $ 4,053,000 | $ 126,488,000 | $ 542,280,000
2020 ATM Equity Program |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Total allowable shares (in shares) |  |  | 17,500,000,000 |  |
Total shares issued (in shares) |  |  | 1,599,304,000 |  |
2018 ATM Equity Program |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Total allowable shares (in shares) |  |  | 12,000,000,000 |  |
Total shares issued (in shares) |  |  | 11,272,034,000 |  |
ATM Equity Programs |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares of common stock (in shares) |  |  | 30,000,000 | 3,119,153,000 | 2,344,022,000
Average price per share (net) (in dollars per share) |  |  | $ 33.65 | $ 38.21 | $ 53.71
Net proceeds |  |  | $ 1,009,000 | $ 119,185,000 | $ 125,905,000
Stock issuance costs |  |  | $ 224,000 | $ 2,130,000 | $ 1,431,000
DRIP |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares permitted for issuance (in shares) | 6,000,000 |  |  |  |
Shares of common stock (in shares) |  |  | 62,577,000 | 138,507,000 | 362,918,000
Net proceeds |  |  | $ 2,744,000 | $ 5,092,000 | $ 19,442,000

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