Derivative - Changes in AOCL, net of tax (Details) (Details) $ in Thousands	6 Months Ended
Jun. 30, 2020 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, December 31, 2019	$ 571,742
Amounts reclassified from AOCL	200
Balance, June 30, 2020	351,929
Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, December 31, 2019	(435)
Balance, June 30, 2020	(4,804)
Interest rate swap agreement \| Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, December 31, 2019	0
Other comprehensive loss before reclassifications	(4,045)
Amounts reclassified from AOCL	208
Other comprehensive loss, net of tax	(3,837)
Balance, June 30, 2020	$ (3,837)

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

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