Shareholders' Equity, Noncontrolling Interests and Other Comprehensive Income - Summary of Activity in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 2,100,106	$ 2,112,549	$ 2,081,947	$ 2,215,639
Other comprehensive loss before reclassifications	(15,388)	3,973	(51,347)	12,576
Reclassification of realized interest on swap agreements	(288)	(55)	(1,374)	417
Net current period other comprehensive Income (loss)	(15,676)	3,918	(52,721)	12,993
Ending Balance	2,229,523	2,123,804	2,229,523	2,123,804
AOCI Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Net current period other comprehensive Income (loss)	1,108	(789)	8,067	(2,340)
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(29,570)	10,138	516	2,614
Ending Balance	$ (44,138)	$ 13,267	$ (44,138)	$ 13,267

Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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