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Revenue Recognition - Schedule of Disaggregation of Noninterest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	$ 67,555	$ 65,961
Noninterest Income (out-of-scope of ASC 606)	7,878	11,488
Total Noninterest Income	75,433	77,449	$ 69,204
Noninterest income related to gain on sale of fixed assets		2,900
Commissions and Fees
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	28,252	27,272
Installment Billing
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	(35)	6
Refund of Commissions
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	30	(29)
Contract Liabilities/Deferred Revenue
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	(195)	(181)
Contingent Commissions
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	3,039	2,301
Subtotal Insurance Revenues
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	31,091	29,369
Trust and Asset Management
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	11,441	11,848
Mutual Fund & Investment Income
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	4,993	5,440
Subtotal Investment Service Income
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	16,434	17,288
Service Charges on Deposit Accounts
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	8,321	8,435
Card Services Income
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	10,526	9,693
Other
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of ASC 606)	$ 1,183	$ 1,176

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Noninterest Income, Other Operating Income, Not In Scope For Topic 606

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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13)
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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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