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Stock Based Compensation Plan (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Additional Disclosures [Abstract]
Compensation cost related to unvested equity awards		$ 12.2
Weighted-average period for recognition of cost		2 years 1 month 6 days
Selling, General and Administrative Expense [Member]
Additional Disclosures [Abstract]
Stock-based compensation expense		$ 2.7	$ 1.0
Service-Based Restricted Stock Awards [Member]
Equity Award Activity [Roll Forward]
Outstanding, beginning balance (in shares)		239,281
Granted/Issued (in shares)		114,368
Awards vested or rights exercised (in shares)	[1]	0
Forfeited (in shares)		(1,225)
Outstanding, ending balance (in shares)		352,424
Expected to vest (in shares)		352,424
Weighted-Average Award Price [Roll Forward]
Outstanding, beginning balance (in dollars per share)		$ 20.77
Granted/Issued (in dollars per share)		32.96
Awards vested or rights exercised (in dollars per share)	[1]	0
Forfeited (in dollars per share)		23.94
Outstanding, ending balance (in dollars per share)		24.71
Expected to vest (in dollars per share)		$ 24.71
Additional Disclosures [Abstract]
Aggregate intrinsic value of outstanding awards		$ 13.1
Service-Based Restricted Stock Awards [Member] | Minimum [Member]
Additional Disclosures [Abstract]
Vesting period of awards		3 years
Service-Based Restricted Stock Awards [Member] | Maximum [Member]
Additional Disclosures [Abstract]
Vesting period of awards		4 years
Performance-Based Restricted Stock Awards [Member]
Equity Award Activity [Roll Forward]
Outstanding, beginning balance (in shares)		213,895
Granted/Issued (in shares)		91,485
Awards vested or rights exercised (in shares)	[1]	(56,578)
Forfeited (in shares)		0
Additional units earned due to performance (in shares)		77,265
Outstanding, ending balance (in shares)		326,067
Expected to vest (in shares)		383,882
Weighted-Average Award Price [Roll Forward]
Outstanding, beginning balance (in dollars per share)		$ 21.08
Granted/Issued (in dollars per share)		32.75
Awards vested or rights exercised (in dollars per share)	[1]	22.95
Forfeited (in dollars per share)		0
Additional units earned due to performance (in dollars per share)		20.42
Outstanding, ending balance (in dollars per share)		23.87
Expected to vest (in dollars per share)		$ 25.26
Additional Disclosures [Abstract]
Fair value of vested shares		$ 2.0
Aggregate intrinsic value of outstanding awards		$ 14.3
Performance period		1 year
Cliff vesting period		3 years
[1] Includes shares repurchased from employees for employee’s tax liability.

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