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Fair Value Measurements - Assets and Liabilities Not Measured and Reported at Fair Value on a Recurring Basis or Nonrecurring Basis (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financial assets |  |
Securities available for sale, at fair value | $ 1,268,280 | $ 1,250,777
Loans held for sale | 461,681 | 411,427
Mortgage servicing rights | 48,779 | 48,230
Carrying Value |  |
Financial assets |  |
Cash and cash equivalents | 443,862 | 569,111
Securities available for sale, at fair value | 1,268,280 | 1,250,777
Loans held for sale | 461,681 | 411,427
Loans, net | 9,004,595 | 9,034,103
Mortgage servicing rights | 48,779 | 48,230
Derivative instruments | 11,282 | 6,519
Financial liabilities |  |
Deposits | 10,190,061 | 10,128,557
Short-term borrowings | 139,011 | 387,706
Other long-term borrowings | 23 | 53
Federal Home Loan Bank advances | 6,290 | 6,690
Junior subordinated debentures | 109,926 | 109,636
Subordinated notes | 146,684 | 147,239
Derivative instruments | 13,566 | 8,388
Fair Value |  |
Financial assets |  |
Cash and cash equivalents | 443,862 | 569,111
Securities available for sale, at fair value | 1,268,280 | 1,250,777
Loans held for sale | 461,681 | 411,427
Loans, net | 8,728,122 | 8,818,039
Mortgage servicing rights | 49,757 | 61,111
Derivative instruments | 11,282 | 6,519
Financial liabilities |  |
Deposits | 10,183,841 | 10,103,107
Short-term borrowings | 139,011 | 387,706
Other long-term borrowings | 23 | 53
Federal Home Loan Bank advances | 6,493 | 6,751
Junior subordinated debentures | 103,346 | 109,766
Subordinated notes | 147,888 | 148,875
Derivative instruments | 13,566 | 8,388
Fair Value | Level 1 |  |
Financial assets |  |
Cash and cash equivalents | 443,862 | 569,111
Securities available for sale, at fair value | 0 | 0
Loans held for sale | 0 | 0
Loans, net | 0 | 0
Mortgage servicing rights | 0 | 0
Derivative instruments | 0 | 0
Financial liabilities |  |
Deposits | 7,825,733 | 7,765,773
Short-term borrowings | 139,011 | 387,706
Other long-term borrowings | 23 | 53
Federal Home Loan Bank advances | 0 | 0
Junior subordinated debentures | 0 | 0
Subordinated notes | 0 | 0
Derivative instruments | 0 | 0
Fair Value | Level 2 |  |
Financial assets |  |
Cash and cash equivalents | 0 | 0
Securities available for sale, at fair value | 1,257,894 | 1,240,144
Loans held for sale | 323,219 | 219,848
Loans, net | 0 | 0
Mortgage servicing rights | 0 | 0
Derivative instruments | 11,282 | 6,519
Financial liabilities |  |
Deposits | 2,358,108 | 2,337,334
Short-term borrowings | 0 | 0
Other long-term borrowings | 0 | 0
Federal Home Loan Bank advances | 6,493 | 6,751
Junior subordinated debentures | 103,346 | 109,766
Subordinated notes | 147,888 | 148,875
Derivative instruments | 13,566 | 8,388
Fair Value | Level 3 |  |
Financial assets |  |
Cash and cash equivalents | 0 | 0
Securities available for sale, at fair value | 10,386 | 10,633
Loans held for sale | 138,462 | 191,579
Loans, net | 8,728,122 | 8,818,039
Mortgage servicing rights | 49,757 | 61,111
Derivative instruments | 0 | 0
Financial liabilities |  |
Deposits | 0 | 0
Short-term borrowings | 0 | 0
Other long-term borrowings | 0 | 0
Federal Home Loan Bank advances | 0 | 0
Junior subordinated debentures | 0 | 0
Subordinated notes | 0 | 0
Derivative instruments | $ 0 | $ 0

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + 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=118952595&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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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7524895&loc=d3e120260-111741 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745 + Details
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