Employee Incentive Plans - Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Options
Outstanding at beginning of period (shares)	1,795,116
Grants (shares)	188,626	0	0
Exercised (shares)	(264,826)
Forfeited/Expired (shares)	(165,109)
Outstanding at end of period (shares)	1,553,807	1,795,116
Options exercisable (shares)	1,511,469
Weighted- Average Exercise Price Per Share
Outstanding at beginning of period ($ per share)	$ 29.99
Granted ($ per share)	5.32
Exercised ($ per share)	9.22
Forfeited/Expired ($ per share)	15.12
Outstanding at end of period ($ per share)	32.12	$ 29.99
Options exercisable ($ per share)	$ 32.87
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted-average remaining contractual life of options outstanding	3 years 21 days
Weighted-average remaining contractual life of options exercisable	2 years 11 months 15 days
Aggregate intrinsic value of options outstanding	$ 6,913,000
Aggregate intrinsic value of options exercisable	$ 6,115,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Stock price ($ per share)	$ 24.18

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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