Derivative Financial Instruments - Changes in Fair Value of Derivative Contracts (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax:
Net (gain) loss recognized in other comprehensive loss	$ 4,881	$ 8,214
Gain recognized in earnings	500	(300)
Interest rate swap agreements
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax:
Gain recognized in earnings	(35)	(37)
Derivative contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax:
Beginning balance	15,989	9,238
(Gain) loss recognized in other comprehensive loss	(4,164)	8,356
Amounts reclassified from other comprehensive loss to earnings	(489)	(142)
Net (gain) loss recognized in other comprehensive loss	(4,653)	8,214
Ending balance	$ 11,301	$ 17,415

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

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+ Details

- Definition

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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+ Details