Summary of Significant Accounting Policies (Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accounting Policies [Abstract]
Net income	$ 43,962	$ 48,559
Basic earnings per share:
Income available to common stockholders, basic	$ 43,962	$ 48,559
Weighted average common shares outstanding, basic (in shares)	75,817,971	76,516,543
Income available to common stockholders, per share amount, basic (usd per share)	$ 0.58	$ 0.63
Dilutive shares (in shares)	96,108	64,319
Diluted earnings per share:
Income available to common stockholders, diluted	$ 43,962	$ 48,559
Weighted average common shares outstanding, diluted (in shares)	75,914,079	76,580,862
Income available to common stockholders, per share amount, diluted (usd per share)	$ 0.58	$ 0.63