XML 54 R43.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Investment Securities - Temporarily Impaired Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017
--- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair Value (Estimated) (Less than 12 months) | $ 267,597 | $ 148,611 | $ 194,691
Unrealized Losses (Less than 12 months) | (7,835) | (2,100) | (3,018)
Fair Value (Estimated) (12 months or more) | 189,876 | 144,394 | 60,608
Unrealized Losses (12 months or more) | (12,273) | (3,843) | (1,760)
Fair Value (Estimated) | 457,473 | 293,005 | 255,299
Unrealized Losses | (20,108) | (5,943) | (4,778)
U.S. Government-sponsored agencies |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair Value (Estimated) (Less than 12 months) | 7,753 | 7,161 | 7,958
Unrealized Losses (Less than 12 months) | (247) | (94) | (197)
Fair Value (Estimated) (12 months or more) | 7,614 | 3,814 | 0
Unrealized Losses (12 months or more) | (541) | (86) | 0
Fair Value (Estimated) | 15,367 | 10,975 | 7,958
Unrealized Losses | (788) | (180) | (197)
Mortgage-backed securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair Value (Estimated) (Less than 12 months) | 154,611 | 132,025 | 147,326
Unrealized Losses (Less than 12 months) | (4,333) | (1,857) | (1,635)
Fair Value (Estimated) (12 months or more) | 143,771 | 101,707 | 48,015
Unrealized Losses (12 months or more) | (7,427) | (2,693) | (1,106)
Fair Value (Estimated) | 298,382 | 233,732 | 195,341
Unrealized Losses | (11,760) | (4,550) | (2,741)
State and political subdivisions |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair Value (Estimated) (Less than 12 months) | 105,233 | 9,425 | 39,407
Unrealized Losses (Less than 12 months) | (3,255) | (149) | (1,186)
Fair Value (Estimated) (12 months or more) | 38,491 | 38,864 | 12,583
Unrealized Losses (12 months or more) | (4,305) | (1,061) | (652)
Fair Value (Estimated) | 143,724 | 48,289 | 51,990
Unrealized Losses | $ (7,560) | (1,210) | (1,838)
Other equity securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair Value (Estimated) (Less than 12 months) |  | 0 | 0
Unrealized Losses (Less than 12 months) |  | 0 | 0
Fair Value (Estimated) (12 months or more) |  | 9 | 10
Unrealized Losses (12 months or more) |  | (3) | (2)
Fair Value (Estimated) |  | 9 | 10
Unrealized Losses |  | $ (3) | $ (2)

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |