Stock-Based Compensation and Other Employee Benefit Plans - ESPP (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Common shares issued (in shares)	21,636	39,596	60,669	193,655
Cash proceeds (in dollars)			$ 0	$ 5,483
Employee Stock Purchase Plans
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
ESPP purchase price, percent			85.00%
Cash proceeds (in dollars)	$ 1,800	$ 1,500	$ 5,000	5,500
Compensation expense	$ 300	$ 500	$ 900	$ 1,700

Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit. Other employee benefit expense includes, but is not limited to, service component of net periodic benefit cost for defined benefit plan. Excludes compensation cost in cost of good and service sold.

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Amount of cash inflow from issuance of shares under share-based payment arrangement. Includes, but is not limited to, option exercised.

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Purchase price of common stock expressed as a percentage of its fair value.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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