Affordable Housing Projects Tax Credit Partnerships (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Low Income Housing Investment Basis Adjustment, Provisional Income Tax (Expense) Benefit	$ 2,000
Net affordable housing tax credit investments and related unfunded commitments		$ 76,300	$ 73,700
Affordable Housing Tax Credit Investments, Unfunded Commitments [Abstract]
2020		14,286
2021		5,310
2022		79
2023		55
2024		55
Thereafter		1,485
Total Unfunded Commitments		21,270
Investments in Affordable Housing Projects [Abstract]
Tax Credits and Other Tax Benefits recognized		11,719	13,572	$ 13,569
Amortization expense in provision for income taxes		7,566	8,311	8,373
Affordable Housing Tax Credits, Proportional Amortization Method		3,014	1,641	1,040
Proportional Amortization Method, Qualified Affordable Housing Project Investments, Amortization		$ 2,578	$ 1,332	$ 800