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Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 01, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 7,725		$ 7,725
Stock-based compensation expense	$ 2,311	$ 1,420	$ 4,807	$ 1,948
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Weighted average price per share (in dollars per share)	$ 29.95		$ 29.95		$ 31.40	$ 28.90
Restricted Stock Units (RSUs) | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Restricted Stock Units (RSUs) | 2015 Incentive Award Plan | 2015 Incentive Award Plan approved on June 19, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (shares)	3,000,000		3,000,000
Number of shares available for grant (shares)	1,505,685		1,505,685

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

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