Changes in Accumulated Other Comprehensive Income by Component - Summary (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated other comprehensive income
Beginning balance	$ 480,461	$ 460,305	$ 440,780
Other comprehensive (loss) income before reclassifications	(1,522)	2,557	2,848
(Gains) losses reclassified from other comprehensive income	(41)	87	(87)
Net current period other comprehensive (loss) income	(1,563)	2,644	2,761
Ending balance	452,677	480,461	460,305
Realized loss	100	100
Realized gain		(100)
Changes in other comprehensive (loss) income, tax expense (benefit)	400	(700)	(700)
Accumulated Other Comprehensive Income (Loss), net of Taxes
Accumulated other comprehensive income
Beginning balance	5,563	2,919	158
Ending balance	$ 4,000	$ 5,563	$ 2,919

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details