Summary of Significant Accounting Policies, Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator [Abstract]
Net earnings	$ 118,745	$ 109,472	$ 82,047
Denominator [Abstract]
Denominator for basic EPS - weighted average common shares (in shares)	42,077	42,301	42,263
Effect of dilutive securities (in shares)	181	45	31
Denominator for diluted EPS - diluted weighted average shares outstanding (in shares)	42,258	42,346	42,294
Earnings per Common Share [Abstract]
Basic (in dollars per share)	$ 2.82	$ 2.59	$ 1.94
Diluted (in dollars per share)	$ 2.81	$ 2.59	$ 1.94