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Stock-based Compensation (Details) - USD ($)			3 Months Ended		6 Months Ended
	May 18, 2021	Jan. 31, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stock-based compensation (benefit) expense			$ 1,100,000	$ 900,000	$ 5,200,000	$ 3,400,000
Income tax benefits related to the stock-based compensation plans			$ 300,000	200,000	$ 1,400,000	$ 800,000
Omnibus Plan 2014 [Member]
Number of shares authorized			1,170,408		1,170,408
Number of additional shares authorized	1,100,000
The 2019 Long-term Incentive Compensation Program [Member]
Awards vesting period		3 years
Restricted Stock Units (RSUs) [Member]
Awards granted					238,985	172,228
Restricted Stock Units (RSUs) [Member] | Omnibus Plan 2014 [Member]
Total unrecognized compensation cost			$ 6,300,000		$ 6,300,000
Weighted-average period of recognition of compensation cost					2 years 6 months
Total fair value of awards vested			200,000	100,000	$ 5,000,000.0	$ 5,100,000
Performance-based Restricted Stock Units [Member]
Awards granted					62,790	72,143
Phantom Share Units (PSUs) [Member] | Phantom Stock Plan [Member]
Stock-based compensation (benefit) expense			100,000	(200,000)	$ 600,000	$ 1,100,000
Total fair value of awards vested			$ 2,000	$ 7,000	$ 25,000	$ 8,000

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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