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Loans (Narrative) (Details) - USD ($)	1 Months Ended	9 Months Ended
	May 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Loans held for sale		$ 380,272,000		$ 663,140,000
Loans available for sale, unpaid principal amount		378,200,000
Gains recognized from changes in fair value		1,900,000
Gain on sale of loans		13,119,000	$ 809,000
Demand deposit overdrafts reclassified as loan balances		7,100,000		2,400,000
Non-accrual leases		0		0
Pre-modification recorded investment		679,000
Commitments to lend additional funds to loan customers whose terms have been modified in troubled debt restructurings		0		0
Loans acquired with deteriorated credit quality		0		$ 0
Customer List [Member]
Gross intangible assets	$ 3,400,000	$ 3,400,000
Intangible asset amortization period	10 years
Acquisition purchase price	$ 60,000,000

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Demand Deposit Accounts In Overdraft Status

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.

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Amount, after allowance for bad debt, of loan receivables held-for-sale that are not part of a disposal group. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities.

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Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

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This is the principal amount outstanding for loans which are in the process of being securitized as of the date of the statement of financial position (across all types of loans).

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