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Shareholders' Equity, Noncontrolling Interests and Other Comprehensive Loss - Summary of Change in Noncontrolling Interest (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | $ 644,657 |  |
Net income (loss) | (66,038) | $ 21,204 | $ (15,698)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership | 0 | 0 | 0
Other comprehensive income (loss) - unrealized loss on valuation of swap agreements | (74,236) | (35,674) | (2,659)
Acquisition of noncontrolling interest | 588 |  |
Reclassification of realized interest on swap agreements | 15,203 | (872) | 71
Noncontrolling interest contributions | 52,674 | 161,628 | 47,560
Noncontrolling interest distributions | (27,574) | (94,289) | (24,793)
Employee Long-term Incentive Plan Unit Awards | 10,912 | 10,957 | 12,948
Reallocation of noncontrolling interests / Rebalancing adjustment | 0 | 0 | 0
Ending Balance | 607,239 | 644,657 |
Noncontrolling Interests |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | 644,657 | 622,442 | 648,440
Distributions declared per Common OP Unit | (2,218) | (7,124) | (6,888)
Net income (loss) | (57,279) | (31,841) | (47,137)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership | (6,544) | (5,104) | (2,068)
Other comprehensive income (loss) - unrealized loss on valuation of swap agreements | (20,955) | (4,935) | (810)
Acquisition of noncontrolling interest | 15,918 |  |
Reclassification of realized interest on swap agreements | 5,638 | 80 | 320
Noncontrolling interest contributions | 52,674 | 161,628 | 47,560
Noncontrolling interest distributions | (27,574) | (94,289) | (24,793)
Employee Long-term Incentive Plan Unit Awards | 10,130 | 10,411 | 12,374
Reallocation of noncontrolling interests / Rebalancing adjustment | (7,197) | (6,611) | (4,556)
Ending Balance | 607,239 | 644,657 | 622,442
Noncontrolling Interests | Cumulative Effect of Change in Accounting Principle |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | (11) |  |
Ending Balance |  | (11) |
Noncontrolling Interests | Noncontrolling Interests in Partially-Owned Affiliates |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | 546,987 | 518,219 | 545,519
Distributions declared per Common OP Unit | 0 | 0 | 0
Net income (loss) | (57,404) | (35,677) | (49,709)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership | 0 | 0 | 0
Other comprehensive income (loss) - unrealized loss on valuation of swap agreements | (18,246) | (3,036) | (681)
Acquisition of noncontrolling interest | 15,918 |  |
Reclassification of realized interest on swap agreements | 5,464 | 142 | 323
Noncontrolling interest contributions | 52,674 | 161,628 | 47,560
Noncontrolling interest distributions | (27,574) | (94,289) | (24,793)
Employee Long-term Incentive Plan Unit Awards | 0 | 0 | 0
Reallocation of noncontrolling interests / Rebalancing adjustment | 0 | 0 | 0
Ending Balance | 517,808 | 546,987 | 518,219
Noncontrolling Interests | Noncontrolling Interests in Partially-Owned Affiliates | Cumulative Effect of Change in Accounting Principle |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | (11) |  |
Ending Balance |  | (11) |
Noncontrolling Interests | Operating Partnership, as General Partner or Managing Member |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | 97,670 | 104,223 | 102,921
Distributions declared per Common OP Unit | (2,218) | (7,124) | (6,888)
Net income (loss) | 125 | 3,836 | 2,572
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership | (6,544) | (5,104) | (2,068)
Other comprehensive income (loss) - unrealized loss on valuation of swap agreements | (2,709) | (1,899) | (129)
Acquisition of noncontrolling interest | 0 |  |
Reclassification of realized interest on swap agreements | 174 | (62) | (3)
Noncontrolling interest contributions | 0 | 0 | 0
Noncontrolling interest distributions | 0 | 0 | 0
Employee Long-term Incentive Plan Unit Awards | 10,130 | 10,411 | 12,374
Reallocation of noncontrolling interests / Rebalancing adjustment | (7,197) | (6,611) | (4,556)
Ending Balance | 89,431 | 97,670 | $ 104,223
Noncontrolling Interests | Operating Partnership, as General Partner or Managing Member | Cumulative Effect of Change in Accounting Principle |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | $ 0 |  |
Ending Balance |  | $ 0 |

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