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Stock-Based Compensation - Stock-based Compensation Expense (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) year	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) year	Jun. 30, 2020 USD ($)
Employee
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized Stock Compensation Expense	$ 2,453		$ 2,453
Weighted average remaining expense period | year	2.3		2.3
Pre-Tax Expense	$ 62	$ (52)	$ 225	$ 474
Post-Tax Expense	49	(41)	178	374
Director
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized Stock Compensation Expense	$ 223		$ 223
Weighted average remaining expense period | year	0.8		0.8
Pre-Tax Expense	$ 80	133	$ 177	307
Post-Tax Expense	$ 63	$ 105	$ 140	$ 243

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