Other Assets Other Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Cash Surrender Value of Life Insurance		$ 203,031	$ 199,029
Finance Lease, Right-of-Use Asset		119,787	129,301
Interest and fees receivable income		101,596	81,479
Low Income Housing Tax Credit - LIHTC		213,034	75,149
Income Taxes Receivable		59,565	31,591
Prepaid Expense		22,999	17,099
Equity Investments Without Readily Determinable Fair Value		34,304	27,738
SBIC Investments		16,505	32,327
Equity Investments With Readily Determinable Fair Value		6,147	2,998
Warrants and Rights Outstanding		4,520	3,434
Other Assets, Miscellaneous		63,016	52,488
Other Assets		$ 860,326	$ 636,811
Increase In Low Income Housing Tax Credit - LIHTC	$ 101,000