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Fair value disclosure only table (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Assets, Fair Value Disclosure [Abstract] |  |
Debt Securities, Held-to-maturity | $ 611,490 | $ 497,688
Loans and Leases Receivable, Net Amount | 6,841,901 | 6,294,910
Securities held to maturity, fair value | 603,640 | 494,194
Federal Home Loan Bank Stock | 15,683 | 11,597
Bank Owned Life Insurance | 160,456 | 151,528
Liabilities, Fair Value Disclosure [Abstract] |  |
Advances from Federal Home Loan Banks | 147,806 | 53,264
Junior subordinated debentures | 76,173 | 73,073
Subordinated Debt | 34,728 | 34,682
Deposits [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Financial Liabilities Book Value | 6,716,017 | 6,084,952
Accrued Liabilities, Fair Value Disclosure | 6,716,017 | 6,084,952
Bank Time Deposits [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Financial Liabilities Book Value | 711,103 | 644,301
Accrued Liabilities, Fair Value Disclosure | 703,728 | 639,060
Federal Home Loan Bank Advances [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Advances from Federal Home Loan Banks | 147,806 | 53,264
Federal Home Loan Bank Borrowings, Fair Value Disclosure | 147,603 | 52,111
Customer Repurchase Agreements [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Customer Repurchase Agreements and other short-term borrowings |  | 162,679
Accrued Liabilities, Fair Value Disclosure |  | 162,679
Junior Subordinated Debt [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Junior subordinated debentures | 76,173 | 73,073
Accrued Liabilities, Fair Value Disclosure | 73,827 | 74,680
Subordinated Debt [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Subordinated Debt | 34,728 | 34,682
Accrued Liabilities, Fair Value Disclosure | 32,509 | 32,707
Significant Other Observable Inputs (Level 2) [Member] | Deposits [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Accrued Liabilities, Fair Value Disclosure | 6,716,017 | 6,084,952
Significant Other Observable Inputs (Level 2) [Member] | Bank Time Deposits [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Accrued Liabilities, Fair Value Disclosure | 703,728 | 639,060
Significant Other Observable Inputs (Level 2) [Member] | Federal Home Loan Bank Advances [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Federal Home Loan Bank Borrowings, Fair Value Disclosure | 147,603 |
Accrued Liabilities, Fair Value Disclosure |  | 52,111
Significant Other Observable Inputs (Level 2) [Member] | Junior Subordinated Debt [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Accrued Liabilities, Fair Value Disclosure | 73,827 | 74,680
Significant Unobservable Inputs (Level 3) [Member] | Customer Repurchase Agreements [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Accrued Liabilities, Fair Value Disclosure |  | 162,679
Significant Unobservable Inputs (Level 3) [Member] | Subordinated Debt [Member] |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Accrued Liabilities, Fair Value Disclosure | 32,509 | 32,707
US Treasury Securities [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Debt Securities, Held-to-maturity | 1,004 | 1,006
Securities held to maturity, fair value | 1,015 | 1,035
US Treasury Securities [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Securities held to maturity, fair value | 1,015 | 1,035
Agency mortgage-backed securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Debt Securities, Held-to-maturity | 252,484 | 204,768
Securities held to maturity, fair value | 250,928 | 205,823
Agency mortgage-backed securities | Significant Other Observable Inputs (Level 2) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Securities held to maturity, fair value | 250,928 | 205,823
Agency collateralized mortgage obligations |  |
Assets, Fair Value Disclosure [Abstract] |  |
Debt Securities, Held-to-maturity | 332,775 | 262,998
Securities held to maturity, fair value | 326,724 | 258,408
Agency collateralized mortgage obligations | Significant Other Observable Inputs (Level 2) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Securities held to maturity, fair value | 326,724 | 258,408
Single issuer trust preferred securities issued by banks and insurers |  |
Assets, Fair Value Disclosure [Abstract] |  |
Debt Securities, Held-to-maturity | 1,500 | 1,500
Securities held to maturity, fair value | 1,490 | 1,529
Single issuer trust preferred securities issued by banks and insurers | Significant Other Observable Inputs (Level 2) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Securities held to maturity, fair value | 1,490 | 1,529
Small Business Administration Pooled Securities [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Debt Securities, Held-to-maturity | 23,727 | 27,416
Securities held to maturity, fair value | 23,483 | 27,399
Small Business Administration Pooled Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Securities held to maturity, fair value | 0 | 0
Small Business Administration Pooled Securities [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Securities held to maturity, fair value | 23,483 | 27,399
Small Business Administration Pooled Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Securities held to maturity, fair value | 0 | 0
Loans Net Of Allowance For Loan Loses [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Loans and Leases Receivable, Net Amount | 6,812,792 | 6,261,343
Loans, net of allowance for loan losses | 6,635,209 | 6,116,051
Loans Net Of Allowance For Loan Loses [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Loans, net of allowance for loan losses | 6,635,209 | 6,116,051
Investment in Federal Home Loan Bank Stock [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Federal Home Loan Bank Stock | 15,683 | 11,597
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure | 15,683 | 11,597
Investment in Federal Home Loan Bank Stock [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure | 0 | 0
Investment in Federal Home Loan Bank Stock [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure | 15,683 | 11,597
Investment in Federal Home Loan Bank Stock [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure | 0 | 0
Cash Surrender Value [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Bank Owned Life Insurance | 160,456 | 151,528
Cash Surrender Value, Fair Value Disclosure | 160,456 | 151,528
Cash Surrender Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Surrender Value, Fair Value Disclosure | 0 | 0
Cash Surrender Value [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Surrender Value, Fair Value Disclosure | 160,456 | 151,528
Cash Surrender Value [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Surrender Value, Fair Value Disclosure | $ 0 | $ 0

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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