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Other Comprehensive Income (Loss) - Summary of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 219,440	$ 216,584	$ 215,257	$ 212,508	$ 208,489	$ 204,593	$ 197,787	$ 191,542	$ 212,508	$ 191,542	$ 181,321
Reclassification adjustment for effect of enacted tax law changes											0
Other comprehensive gain (loss)	367	(1,186)	(2,176)	(629)	327	597	3,395	3,050	(3,624)	7,369	(2,095)
Ending balance	223,726	$ 219,440	$ 216,584	215,257	212,508	$ 208,489	$ 204,593	197,787	223,726	212,508	191,542
Accumulated Net Gain (Loss) from Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance				$ 97				$ 1,438	97	1,438	1,544
Unrealized gains (losses) during the period									(6,366)	(1,697)	(134)
Related deferred taxes									1,337	356	28
Other comprehensive gain (loss)									(5,029)	(1,341)	(106)
Ending balance	$ (4,932)				$ 97				$ (4,932)	$ 97	$ 1,438

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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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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