XML 54 R39.htm IDEA: XBRL DOCUMENT
v3.8.0.1

INVESTMENT SECURITIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract] |
Summary of available for sale and held to maturity investment securities |
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
| (Dollars in thousands)
December 31, 2016 |  |  |  |  |  |  |
Held-to-Maturity: |  |  |  |  |  |  |
Mortgage-backed securities: |  |  |  |  |  |  |
Residential-U.S. Government sponsored entities | $ | 124,082 |  |  | $ | 92 |  |  | $ | (2,474 | ) |  | $ | 121,700 |
Commercial-U.S. Government sponsored entities | 93,586 |  |  | — |  |  | (920 | ) |  | 92,666 |
Total held-to-maturity investment securities | $ | 217,668 |  |  | $ | 92 |  |  | $ | (3,394 | ) |  | $ | 214,366 |
Available-for-Sale: |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |
States and political subdivisions | $ | 184,836 |  |  | $ | 2,002 |  |  | $ | (1,797 | ) |  | $ | 185,041 |
Corporate securities | 98,596 |  |  | 974 |  |  | (181 | ) |  | 99,389 |
Mortgage-backed securities: |  |  |  |  |  |  |
Residential-U.S. Government sponsored entities | 775,803 |  |  | 3,698 |  |  | (9,515 | ) |  | 769,986 |
Residential-Non-government sponsored entities | 51,681 |  |  | 627 |  |  | (761 | ) |  | 51,547 |
Commercial-Non-government sponsored entities | 135,248 |  |  | 2,387 |  |  | (411 | ) |  | 137,224 |
Other | 564 |  |  | 96 |  |  | — |  |  | 660 |
Total available-for-sale investment securities | $ | 1,246,728 |  |  | $ | 9,784 |  |  | $ | (12,665 | ) |  | $ | 1,243,847 |
A summary of our investment securities portfolio as of December 31, 2017 and 2016 is as follows:
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
| (Dollars in thousands)
December 31, 2017 |  |  |  |  |  |  |
Held-to-Maturity: |  |  |  |  |  |  |
Mortgage-backed securities: |  |  |  |  |  |  |
Residential-U.S. Government sponsored entities | $ | 100,279 |  |  | $ | 106 |  |  | $ | (2,222 | ) |  | $ | 98,163 |
Commercial-U.S. Government sponsored entities | 91,474 |  |  | — |  |  | (436 | ) |  | 91,038 |
Total held-to-maturity investment securities | $ | 191,753 |  |  | $ | 106 |  |  | $ | (2,658 | ) |  | $ | 189,201 |
Available-for-Sale: |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |
States and political subdivisions | $ | 178,459 |  |  | $ | 2,041 |  |  | $ | (719 | ) |  | $ | 179,781 |
Corporate securities | 73,772 |  |  | 582 |  |  | (76 | ) |  | 74,278 |
U.S. Treasury obligations and direct obligations of U.S Government agencies | 25,519 |  |  | 60 |  |  | (69 | ) |  | 25,510 |
Mortgage-backed securities: |  |  |  |  |  |  |
Residential-U.S. Government sponsored entities | 808,242 |  |  | 2,230 |  |  | (9,789 | ) |  | 800,683 |
Residential-Non-government sponsored entities | 45,679 |  |  | 1,084 |  |  | — |  |  | 46,763 |
Commercial-U.S. Government agencies and sponsored entities | 40,012 |  |  | — |  |  | (287 | ) |  | 39,725 |
Commercial-Non-government sponsored entities | 135,058 |  |  | 2,461 |  |  | (193 | ) |  | 137,326 |
Other | 686 |  |  | 139 |  |  | — |  |  | 825 |
Total available-for-sale investment securities | $ | 1,307,427 |  |  | $ | 8,597 |  |  | $ | (11,133 | ) |  | $ | 1,304,891 |
Schedule of amortized cost and estimated fair value of investment securities by contractual maturity | The amortized cost and estimated fair value of our investment securities at December 31, 2017 by contractual maturity are shown below. Actual maturities may differ from contractual maturities as issuers have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.
| December 31, 2017
| Amortized Cost |  | Fair Value
| (Dollars in thousands)
Held-to-Maturity: |  |  |
Mortgage-backed securities: |  |  |
Residential-U.S. Government-sponsored entities | $ | 100,279 |  |  | $ | 98,163 |
Commercial-U.S. Government-sponsored entities | 91,474 |  |  | 91,038 |
Total held-to-maturity investment securities | $ | 191,753 |  |  | $ | 189,201 |
Available-for-Sale: |  |  |
Due in one year or less | $ | 8,796 |  |  | $ | 8,799 |
Due after one year through five years | 165,356 |  |  | 166,447 |
Due after five years through ten years | 40,762 |  |  | 41,166 |
Due after ten years | 62,836 |  |  | 63,157 |
Mortgage-backed securities |  |  |
Residential-U.S. Government-sponsored entities | 808,242 |  |  | 800,683 |
Residential-Non-government agencies | 45,679 |  |  | 46,763 |
Commercial-U.S. Government agencies and sponsored entities | 40,012 |  |  | 39,725 |
Commercial-Non-government agencies | 135,058 |  |  | 137,326 |
Other | 686 |  |  | 825 |
Total available-for-sale investment securities | $ | 1,307,427 |  |  | $ | 1,304,891 |
Schedule of investment securities in an unrealized loss position | The following table summarizes securities which were in an unrealized or unrecognized loss position at December 31, 2017 and 2016, aggregated by major security type and length of time in a continuous unrealized or unrecognized loss position:
| Less Than 12 Months |  | 12 Months or Longer |  | Total
Description of Securities | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
| (Dollars in thousands)
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |  |  |
States and political subdivisions | $ | 53,811 |  |  | $ | (305 | ) |  | $ | 15,403 |  |  | $ | (414 | ) |  | $ | 69,214 |  |  | $ | (719 | )
Corporate securities | — |  |  | — |  |  | 5,307 |  |  | (76 | ) |  | 5,307 |  |  | (76 | )
U.S. Treasury obligations and direct obligations of U.S Government agencies | 10,740 |  |  | (69 | ) |  | — |  |  | — |  |  | 10,740 |  |  | (69 | )
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |
Residential-U.S. Government sponsored entities | 335,883 |  |  | (3,372 | ) |  | 340,219 |  |  | (8,639 | ) |  | 676,102 |  |  | (12,011 | )
Commercial-U.S. Government sponsored entities | 130,763 |  |  | (723 | ) |  | — |  |  | — |  |  | 130,763 |  |  | (723 | )
Commercial-Non-government sponsored entities | 28,490 |  |  | (193 | ) |  | — |  |  | — |  |  | 28,490 |  |  | (193 | )
Total temporarily impaired securities | $ | 559,687 |  |  | $ | (4,662 | ) |  | $ | 360,929 |  |  | $ | (9,129 | ) |  | $ | 920,616 |  |  | $ | (13,791 | )
| Less Than 12 Months |  | 12 Months or Longer |  | Total
Description of Securities | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
| (Dollars in thousands)
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |  |  |
States and political subdivisions | $ | 85,288 |  |  | $ | (1,797 | ) |  | $ | — |  |  | $ | — |  |  | $ | 85,288 |  |  | $ | (1,797 | )
Corporate securities | 20,357 |  |  | (181 | ) |  | — |  |  | — |  |  | 20,357 |  |  | (181 | )
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |
Residential-U.S. Government sponsored entities | 648,923 |  |  | (11,766 | ) |  | 3,978 |  |  | (223 | ) |  | 652,901 |  |  | (11,989 | )
Residential-Non-government sponsored entities | 30,596 |  |  | (761 | ) |  | — |  |  | — |  |  | 30,596 |  |  | (761 | )
Commercial-U.S. Government sponsored entities | 92,666 |  |  | (920 | ) |  | — |  |  | — |  |  | 92,666 |  |  | (920 | )
Commercial-Non-government sponsored entities | 52,880 |  |  | (411 | ) |  | — |  |  | — |  |  | 52,880 |  |  | (411 | )
Total temporarily impaired securities | $ | 930,710 |  |  | $ | (15,836 | ) |  | $ | 3,978 |  |  | $ | (223 | ) |  | $ | 934,688 |  |  | $ | (16,059 | )

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
Name: | us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the summary of investment holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010 + Details
Name: | us-gaap_SummaryInvestmentHoldingsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration