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Accounting Policies - Summary of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic earnings per share
Net income	$ 20,422	$ 11,655
Weighted average common shares outstanding (in shares)	43,919,549	44,658,512
Basic Earnings Per Share (in USD per share)	$ 0.46	$ 0.26
Diluted earnings per share
Net income	$ 20,422	$ 11,655
Effect of dilutive securities:
Weighted average common shares outstanding (in shares)	44,072,581	44,756,716
Diluted Earnings Per Share (in USD per share)	$ 0.46	$ 0.26
Restricted stock
Effect of dilutive securities:
Effect of dilutive securities (in shares)	102,048	39,845
Stock options
Effect of dilutive securities:
Effect of dilutive securities (in shares)	50,984	58,359

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