Equity - Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 205,301
Income tax expense			$ (185)
Net other comprehensive income (loss)	28,871	$ (31,950)	2,572
Transition adjustment related to adoption	(22,393)	219,817	644,729	$ 469,577
Ending balance	(22,234)	205,301
AOCI Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(57,951)	(28,159)	(28,024)
Gains arising during period	12,269	(42,859)	4,232
Amounts reclassified from accumulated other comprehensive loss	16,602	10,909	(1,475)
Income tax expense			(185)
Net other comprehensive income (loss)	28,871	(31,950)	2,572
Transition adjustment related to adoption	(29,080)	(57,951)	(28,159)	$ (28,024)
Ending balance	(29,080)	(57,951)	(28,159)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(26,623)	(23,916)	(21,814)
Gains arising during period	10,314	(2,901)	693
Amounts reclassified from accumulated other comprehensive loss	(110)	194	97
Income tax expense			(185)
Net other comprehensive income (loss)	10,204	(2,707)	605
Ending balance	(16,419)	(26,623)	(23,916)
Accumulated Other-than-Temporary Impairment Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(3,509)	(5,877)	(6,210)
Amounts reclassified from accumulated other comprehensive loss	211	210	333
Net other comprehensive income (loss)	211	210	333
Ending balance	(3,298)	(3,509)	(5,877)
Interest Rate Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(27,819)	1,634
Gains arising during period	1,955	(39,958)	3,539
Amounts reclassified from accumulated other comprehensive loss	16,501	10,505	(1,905)
Net other comprehensive income (loss)	18,456	(29,453)	1,634
Ending balance	$ (9,363)	(27,819)	1,634
Cumulative Effect, Period of Adoption, Adjustment [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Transition adjustment related to adoption		(3,185)
Cumulative Effect, Period of Adoption, Adjustment [Member] | AOCI Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Transition adjustment related to adoption		2,158	(2,707)
ASU 2018-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | AOCI Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Transition adjustment related to adoption			(2,707)
ASU 2018-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Transition adjustment related to adoption			$ (2,707)
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | AOCI Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Transition adjustment related to adoption		2,158
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accumulated Other-than-Temporary Impairment Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Transition adjustment related to adoption		$ 2,158