Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash paid during the period for:
Interest	$ 32,000	$ 59,967	$ 85,973
Income taxes paid	55,754	36,536	33,776
Transferred to foreclosed property	1,849	822	1,173
Unsettled sales of government guaranteed loans	0	0	8,194
Assets acquired, fair value	848,806	2,174,723	264,937
Liabilities assumed, fair value	695,420	1,987,026	212,844
Net assets acquired	153,386	187,697	52,093
Common stock issued for acquisitions	95,525	163,589
Other non-cash consideration	9,178	0	0
Common Stock
Cash paid during the period for:
Common stock issued for acquisitions	$ 94,046	$ 163,589	$ 0