Loans (Details) - Loan Portfolio - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Loans and Leases Receivable Disclosure [Abstract]
Commercial and industrial	$ 2,699,742	$ 2,524,726
Agricultural	401,858	387,440
Commercial real estate:
Office, retail, and industrial	1,529,675	1,395,454
Multi-family	587,104	528,324
Construction	371,016	216,882
Other commercial real estate	1,000,655	931,190
Total commercial real estate	3,488,450	3,071,850
Total corporate loans	6,590,050	5,984,016
Home equity	722,881	653,468
1-4 family mortgages	415,581	355,854
Installment	223,845	137,602
Total consumer loans	1,362,307	1,146,924
Covered loans	27,180	30,775
Total Loans	7,979,537	7,161,715
Deferred loan fees included in total loans	4,359	5,191
Overdrawn demand deposits included in total loans	$ 4,480	$ 2,810

-- None. No documentation exists for this element. --

No definition available.

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- Definition

This element represents the gross carrying amount of multi-family loans receivable as of the balance sheet date.

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No definition available.

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- Definition

This element represents the gross carrying amount of other commercial real estate loans receivable as of the balance sheet date. This item is a component of US GAAP element Loans Receivable Commercial Real Estate.

+ References

No definition available.

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- Definition

This element represents the gross carrying amount of total corporate loans receivable as of the balance sheet date. Amount consists of commercial and industrial, agricultural, and commercial real estate loans.

+ References

No definition available.

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- Definition

This element represents the aggregate gross carrying amount of all loans, including covered loans, after deducting deferred income, but before deducting the allowance for loan losses as of the balance sheet date.

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No definition available.

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- Definition

This element represents the gross carrying amount of office, retail, and industrial loans receivable, as of the balance sheet date. This item is a component of US GAAP element Loans Receivable Commercial Real Estate.

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.

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- Definition

Amount before allowance of consumer loans, including, but not limited to, mortgage, home equity, vehicles, credit card, installment, and lease financing. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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- Definition

Amount before allowance of revolving, open-end loan, extended under a line of credit and secured by the borrower's residential property. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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- Definition

Amount before allowance of other consumer installment loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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- Definition

Amount before allowance of consumer mortgage. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes subordinated loans such as home equity lines of credit and loans and leases covered under loss sharing agreements.

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- Definition

Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Aggregate gross carrying amount of loans and leases receivable covered by loss sharing agreements.

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No definition available.

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- Definition

Amount before allowance of loans issued to agricultural institutions. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References

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Amount before allowance of loans issued to commercial and industrial institutions. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes real estate loans and loans covered under loss sharing agreements.

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- Definition

Amount before allowance of commercial construction loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

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- Definition

Amount before allowance of commercial loans issued to businesses to acquire, develop, construct, improve, or refinance land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

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