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Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property Plant And Equipment Gross	$ 146,477	$ 133,150
Accumulated depreciation and amortization	(65,372)	(64,258)
Total Premises and Equipment, net	81,105	68,892
Land [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Gross	4,363	5,028
Building And Improvements [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Gross	$ 74,840	67,856
Property Plant And Equipment Useful Life	40 years
Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Gross	$ 21,358	18,274
Leasehold Improvements [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	10 years
Leasehold Improvements [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	5 years
Furniture And Fixtures [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Gross	$ 16,686	17,137
Furniture And Fixtures [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	7 years
Furniture And Fixtures [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	3 years
Information Technology And Other [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Gross	$ 29,230	$ 24,855
Information Technology And Other [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	7 years
Information Technology And Other [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	3 years

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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