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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Amount of tax benefit from exercise of option under share-based payment arrangement.

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Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	May 10, 2010	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 19, 2021	Jun. 18, 2013	Jan. 21, 2003
Stock Based Compensation [Line Items]
Total assets		$ 7,374,903	$ 5,886,614
Total compensation cost		68	132	$ 215
Tax benefit associated with compensation expense		14	28	45
Total compensation cost		1,800	1,300	920
Cash received from option exercise		1,100	255	236
Actual tax benefit realized for the tax deductions		334	59	104
Unrecognized compensation cost		$ 3,200
Weighted-average period cost over which cost is expected to be recognized		2 years 4 months 28 days
Performance Based Share Awards \| Minimum
Stock Based Compensation [Line Items]
Total assets		$ 1,000,000			$ 3,000,000
Performance Based Share Awards \| Maximum
Stock Based Compensation [Line Items]
Total assets		5,000,000			$ 7,000,000
Restricted and Performance Shares
Stock Based Compensation [Line Items]
Total compensation cost		68	132
Tax benefit associated with compensation expense		368	253	148
Total compensation cost		$ 1,800	$ 1,200	$ 705
Option Activity Under the 2003 Plan
Stock Based Compensation [Line Items]
Number of shares available incentive stock options							759,375
Non-option awards granted (in shares)							379,687
Additional common shares available for issuance (in shares)	885,937
Maximum common issued under the plan (in shares)							759,375
Option Activity Under the 2013 Plan
Stock Based Compensation [Line Items]
Number of shares available incentive stock options						225,000
Non-option awards granted (in shares)						900,000
Weighted average grant-date fair value of options granted		$ 0.00	$ 0.00	$ 4.44
Maximum common issued under the plan (in shares)						1,556,325
Option Activity Under the 2021 Plan
Stock Based Compensation [Line Items]
Maximum common issued under the plan (in shares)					1,787,548