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Fair Value Information (Tables) | 3 Months Ended
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Mar. 31, 2018
Fair Value Disclosures [Abstract] |
Assets and Liabilities Measured at Fair Value on Recurring Basis | The tables below present the balances of assets and liabilities measured at fair value on a recurring basis for the periods presented.
|  | Carrying Value at March 31, 2018 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
|  | (Dollars in thousands) |
Description of assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment securities - AFS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | $ | 1,631,340 |  |  | $ | - |  |  | $ | 1,631,340 |  |  | $ | - |
CMO/REMIC - residential |  |  | 255,646 |  |  |  | - |  |  |  | 255,646 |  |  |  | - |
Municipal bonds |  |  | 53,868 |  |  |  | - |  |  |  | 53,868 |  |  |  | - |
Other securities |  |  | 738 |  |  |  | - |  |  |  | 738 |  |  |  | - |
Total investment securities - AFS |  |  | 1,941,592 |  |  |  | - |  |  |  | 1,941,592 |  |  |  | - |
Interest rate swaps |  |  | 1,645 |  |  |  | - |  |  |  | 1,645 |  |  |  | - |
Total assets |  | $ | 1,943,237 |  |  | $ | - |  |  | $ | 1,943,237 |  |  | $ | - |
Description of liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  | $ | 1,645 |  |  | $ | - |  |  | $ | 1,645 |  |  | $ | - |
Total liabilities |  | $ | 1,645 |  |  | $ | - |  |  | $ | 1,645 |  |  | $ | - |
|  | Carrying Value at December 31, 2017 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
|  | (Dollars in thousands) |
Description of assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment securities - AFS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | $ | 1,750,909 |  |  | $ | - |  |  | $ | 1,750,909 |  |  | $ | - |
CMO/REMIC - residential |  |  | 273,829 |  |  |  | - |  |  |  | 273,829 |  |  |  | - |
Municipal bonds |  |  | 55,496 |  |  |  | - |  |  |  | 55,496 |  |  |  | - |
Other securities |  |  | 751 |  |  |  | - |  |  |  | 751 |  |  |  | - |
Total investment securities - AFS |  |  | 2,080,985 |  |  |  | - |  |  |  | 2,080,985 |  |  |  | - |
Interest rate swaps |  |  | 3,211 |  |  |  | - |  |  |  | 3,211 |  |  |  | - |
Total assets |  | $ | 2,084,196 |  |  | $ | - |  |  | $ | 2,084,196 |  |  | $ | - |
Description of liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  | $ | 3,211 |  |  | $ | - |  |  | $ | 3,211 |  |  | $ | - |
Total liabilities |  | $ | 3,211 |  |  | $ | - |  |  | $ | 3,211 |  |  | $ | - |
Assets and Liabilities Measured at Fair Value on Non-Recurring Basis | the following tables provide the level of valuation assumptions used to determine each adjustment and the carrying value of the related assets that had losses during the period.
|  | Carrying Value at December 31, 2017 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |  |  | Total Losses For the Year Ended December 31, 2017 |
|  | (Dollars in thousands) |
Description of assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impaired loans, excluding PCI loans: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial and industrial |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
SBA |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial real estate |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Construction |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SFR mortgage |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Dairy & livestock and agribusiness |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Consumer and other loans |  |  | 378 |  |  |  | - |  |  |  | - |  |  |  | 378 |  |  |  | 74 |
Other real estate owned |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Asset held-for-sale |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total assets |  | $ | 378 |  |  | $ | - |  |  | $ | - |  |  | $ | 378 |  |  | $ | 74 |
Estimated Fair Value of Financial Instruments | The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.
|  | March 31, 2018
|  |  |  | Estimated Fair Value
|  | Carrying Amount |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (Dollars in thousands)
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total cash and cash equivalents |  | $ | 456,238 |  |  | $ | 456,238 |  |  | $ | - |  |  | $ | - |  |  | $ | 456,238 |
Interest-earning balances due from depository institutions |  |  | 10,100 |  |  |  | - |  |  |  | 10,095 |  |  |  | - |  |  |  | 10,095 |
FHLB stock |  |  | 17,688 |  |  |  | - |  |  |  | 17,688 |  |  |  | - |  |  |  | 17,688 |
Investment securities available-for-sale |  |  | 1,941,592 |  |  |  | - |  |  |  | 1,941,592 |  |  |  | - |  |  |  | 1,941,592 |
Investment securities held-to-maturity |  |  | 798,284 |  |  |  | - |  |  |  | 776,130 |  |  |  | - |  |  |  | 776,130 |
Total loans, net of allowance for loan losses (1) |  |  | 4,735,048 |  |  |  | - |  |  |  | - |  |  |  | 4,555,459 |  |  |  | 4,555,459 |
Swaps |  |  | 1,645 |  |  |  | - |  |  |  | 1,645 |  |  |  | - |  |  |  | 1,645 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposits: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noninterest-bearing |  | $ | 4,062,691 |  |  | $ | 4,062,691 |  |  | $ | - |  |  | $ | - |  |  | $ | 4,062,691 |
Interest-bearing |  |  | 2,646,744 |  |  |  | - |  |  |  | 2,643,627 |  |  |  | - |  |  |  | 2,643,627 |
Borrowings |  |  | 487,277 |  |  |  | - |  |  |  | 486,924 |  |  |  | - |  |  |  | 486,924 |
Junior subordinated debentures |  |  | 25,774 |  |  |  | - |  |  |  | - |  |  |  | 19,909 |  |  |  | 19,909 |
Swaps |  |  | 1,645 |  |  |  | - |  |  |  | 1,645 |  |  |  | - |  |  |  | 1,645 |
|  | December 31, 2017
|  |  |  | Estimated Fair Value
|  | Carrying Amount |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (Dollars in thousands)
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total cash and due from banks |  | $ | 144,377 |  |  | $ | 144,377 |  |  | $ | - |  |  | $ | - |  |  | $ | 144,377 |
Interest-earning balances due from depository institutions |  |  | 17,952 |  |  |  | - |  |  |  | 17,951 |  |  |  | - |  |  |  | 17,951 |
FHLB stock |  |  | 17,688 |  |  |  | - |  |  |  | 17,688 |  |  |  | - |  |  |  | 17,688 |
Investment securities available-for-sale |  |  | 2,080,985 |  |  |  | - |  |  |  | 2,080,985 |  |  |  | - |  |  |  | 2,080,985 |
Investment securities held-to-maturity |  |  | 829,890 |  |  |  | - |  |  |  | 819,215 |  |  |  | - |  |  |  | 819,215 |
Total loans, net of allowance for loan losses |  |  | 4,771,046 |  |  |  | - |  |  |  | - |  |  |  | 4,678,402 |  |  |  | 4,678,402 |
Swaps |  |  | 3,211 |  |  |  | - |  |  |  | 3,211 |  |  |  | - |  |  |  | 3,211 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposits: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noninterest-bearing |  | $ | 3,846,436 |  |  | $ | 3,846,436 |  |  | $ | - |  |  | $ | - |  |  | $ | 3,846,436 |
Interest-bearing |  |  | 2,700,417 |  |  |  | - |  |  |  | 2,697,781 |  |  |  | - |  |  |  | 2,697,781 |
Borrowings |  |  | 553,773 |  |  |  | - |  |  |  | 553,416 |  |  |  | - |  |  |  | 553,416 |
Junior subordinated debentures |  |  | 25,774 |  |  |  | - |  |  |  | - |  |  |  | 18,070 |  |  |  | 18,070 |
Swaps |  |  | 3,211 |  |  |  | - |  |  |  | 3,211 |  |  |  | - |  |  |  | 3,211 |
| (1) | The fair value of loans as of March 31, 2018 was measured using an exit price notion.

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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