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Share-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation [Abstract]
Exercised Options, Intrinsic Value	$ 6,500	$ 2,500	$ 2,000
Equity Award Vesting Period	3 years
Share Based Compensation [Line Items]
ESPP: Purchase Price Percentage	85.00%
ESPP: Discount from Market Price	15.00%
Director Stock Ownership Plan Maximum Number of Shares Authorized Under Plan	75,000
Director Retainer Annual Fee	$ 100
Director Stock ownership Percentage Threshold	400.00%
Director Stock Ownership Plan Percentage Cash	25.00%
Share-based Compensation Expense	$ 10,996	$ 4,861	$ 3,724
Director Stock Ownership Plan Percentage Stock	75.00%
Director Stock Ownership Plan Percentage Total	100.00%
Risk-free Interest Rate	0.36%	1.52%	2.54%	1.67%
Expected Term (Years)	4 years	4 years	4 years	4 years
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross	49,115	51,610	35,842	42,477
Employee Stock Option [Member]
Share Based Compensation [Line Items]
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1	1 year 10 months 24 days
Restricted Stock LTIP [Member]
Share Based Compensation [Line Items]
Nonvested Stock Awards Granted	28,244
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	$ 4,700
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1	1 year 7 months 6 days
Annual Incentive Plan [Member]
Share Based Compensation [Line Items]
Share-based Compensation Expense	$ 0	$ 0	$ 0
Restricted Stock Units (RSUs) LTIP Plan [Member]
Share Based Compensation [Line Items]
Nonvested Stock Awards Granted	6,030
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	$ 800
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1	2 years
Combination And Other Acquisition-Related [Member]
Share Based Compensation [Line Items]
Share-based Compensation Expense	$ 1,500	900	100
Performance Incentive Stock Units [Member]
Share Based Compensation [Line Items]
Share-based Compensation Expense	840	$ 0	$ 0
Unrecognized Compensation Expense, Options	$ 2,500
Vesting Shares Target Lower Percent	0.00%
Vesting Shares Target Upper Percent	200.00%
Risk-free Interest Rate	0.28%
Expected Term (Years)	3 years
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1	2 years 2 months 12 days
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross	20,000
Defined Contribution Plan [Member]
Share Based Compensation [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent	6.00%
Defined contribution plan employer matching contribution percent maximum	3.00%
Defined Contribution Plan Employer Matching Contribution Percent Of Match	50.00%
Defined Contribution Plan Employer Discretionary Contribution Amount	$ 3,100