Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Other Assets [Abstract]
Cash Surrender Value of Life Insurance	$ 196,745	$ 194,897
Finance Lease, Right-of-Use Asset	119,086	0
Interest and fees receivable income	83,308	88,754
Low Income Housing Tax Credit - LIHTC	63,151	59,507
Equity Method Investments, Other Asset Investments	58,892	59,062
Income Taxes Receivable	28,326	39,096
Prepaid Expense	19,576	18,006
Equity Investments Without Readily Determinable Fair Value	14,827	14,758
Equity Warrants	3,931	4,793
Equity Investments With Readily Determinable Fair Value	3,284	4,891
Other Assets, Miscellaneous	20,993	39,132
Other Assets	$ 612,119	$ 522,896