The value of common securities issued to the parent during the period.

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- Definition

Represents the number of consecutive quarterly periods for which payments of interest can be deferred without default or penalty.

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No definition available.

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Represents the number of wholly-owned statutory trusts created during the period.

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No definition available.

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Represents the redemption period following the occurrence of certain events.

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- Definition

The percentage points added to the reference rate to compute the variable rate on the trust preferred securities.

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No definition available.

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The reference rate for the variable rate of the trust preferred securities, such as LIBOR or the US treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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The value of trust preferred securities issued during the period.

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Trust Preferred Securities Issued Value, Held By Company

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No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The sum of the carrying amounts, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of related debt obligations, primarily secured borrowings and repurchase agreements, and for which the transferees are not permitted to sell or re-pledge them to an unrelated party.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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SHORT-TERM BORROWINGS AND LONG-TERM DEBT - Narrative (Details)			1 Months Ended			9 Months Ended
	Jan. 07, 2019 USD ($)	Dec. 17, 2018 USD ($)	Dec. 31, 2004 USD ($)	Sep. 30, 2004 USD ($)	Oct. 31, 2003 USD ($) trust	Sep. 30, 2019 USD ($) period	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Short-term borrowings						$ 205,000,000	$ 197,000,000
Long term borrowings						101,547,000	122,166,000
Number of wholly owned statutory trusts created \| trust					2
Federal Home Loan Bank Borrowings
Debt Instrument [Line Items]
Line of Credit, maximum borrowing capacity						1,800,000,000	1,430,000,000
Letters of Credit, outstanding						118,900,000	4,600,000
Unused borrowings available						1,430,000,000	1,180,000,000
Short-term borrowings						205,000,000.0	197,000,000.0
Commercial real estate and commercial loans pledged as collateral						2,420,000,000
Federal Reserve discount window line of credit
Debt Instrument [Line Items]
Unused borrowings available						65,600,000	73,900,000
Commercial real estate and commercial loans pledged as collateral						118,900,000	123,300,000
C P B Capital Trust I I [Member]
Debt Instrument [Line Items]
Common securities issued					$ 600,000
Trust preferred securities issued value	$ 20,000,000.0				$ 20,000,000.0
Trust Preferred Securities Issued Value, Held By Company	600,000
Trust preferred securities, variable rate basis					three-month LIBOR
Trust preferred securities, basis spread on variable rate					2.85%
C P B Capital Trust I I I [Member]
Debt Instrument [Line Items]
Common securities issued					$ 600,000
Trust preferred securities issued value		$ 20,000,000.0			$ 20,000,000.0
Trust Preferred Securities Issued Value, Held By Company		600,000
Trust preferred securities, variable rate basis					three-month LIBOR
Trust preferred securities, basis spread on variable rate					2.85%
C P B Capital Trust I V [Member]
Debt Instrument [Line Items]
Common securities issued				$ 900,000
Trust preferred securities issued value				$ 30,000,000.0
Trust preferred securities, variable rate basis				three-month LIBOR
Trust preferred securities, basis spread on variable rate				2.45%
C P B Capital Trust V [Member]
Debt Instrument [Line Items]
Common securities issued			$ 600,000
Trust preferred securities issued value			$ 20,000,000.0
Trust preferred securities, variable rate basis			three-month LIBOR
Trust preferred securities, basis spread on variable rate			1.87%
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Long term borrowings						$ 50,000,000.0	$ 50,000,000
Subordinated Debt [Member]
Debt Instrument [Line Items]
Number of periods interest can be deferred \| period						20
Subordinated Debt [Member] \| C P B Capital Trust I I [Member]
Debt Instrument [Line Items]
Long term borrowings	$ 20,600,000					$ 20,600,000
Subordinated Debt [Member] \| C P B Capital Trust I I I [Member]
Debt Instrument [Line Items]
Long term borrowings		$ 20,600,000				20,600,000
Subordinated Debt [Member] \| C P B Capital Trust I V [Member]
Debt Instrument [Line Items]
Long term borrowings						30,900,000
Subordinated Debt [Member] \| C P B Capital Trust V [Member]
Debt Instrument [Line Items]
Long term borrowings						$ 20,600,000
Maximum [Member] \| Subordinated Debt [Member]
Debt Instrument [Line Items]
Redemption period						90 days