Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 17, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period (shares)		688,000	1,427,000
Dollar Amount Purchased in 2021		$ 49,610	$ 107,000
Stock repurchase program, average cost per share (in dollars per share)		$ 72.10	$ 74.96
Dollar Amount Authorized		$ 100,000
Remaining Dollar Amount Authorized For Future Purchases		72,217
Payments of dividends		$ 47,533	$ 44,752	$ 43,952
Shares issued upon acquisition of American First Finance (shares)	8,046,252
July 25, 2018 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period (shares)		318,000
Dollar Amount Purchased in 2021		$ 21,827
Remaining Dollar Amount Authorized For Future Purchases		$ 0
October 24, 2018 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period (shares)		370,000
Dollar Amount Purchased in 2021		$ 27,783
Remaining Dollar Amount Authorized For Future Purchases		$ 72,217