XML 38 R26.htm IDEA: XBRL DOCUMENT
v3.7.0.1

INVESTMENT SECURITIES (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2017
INVESTMENT SECURITIES [Abstract] |
Amortized Cost and Estimated Fair Value of Investment Securities | The amortized cost and estimated fair value of investment securities as of March 31, 2017 and December 31, 2016 are as follows:
|  | March 31, 2017 |  |  | December 31, 2016 |
(000's omitted) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Available-for-Sale Portfolio: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and agency securities |  | $ | 1,878,982 |  |  | $ | 30,358 |  |  | $ | 1,106 |  |  | $ | 1,908,234 |  |  | $ | 1,876,358 |  |  | $ | 28,522 |  |  | $ | 2,118 |  |  | $ | 1,902,762 |
Obligations of state and political subdivisions |  |  | 564,501 |  |  |  | 14,603 |  |  |  | 446 |  |  |  | 578,658 |  |  |  | 582,655 |  |  |  | 13,389 |  |  |  | 1,054 |  |  |  | 594,990 |
Government agency mortgage-backed securities |  |  | 237,257 |  |  |  | 4,526 |  |  |  | 2,729 |  |  |  | 239,054 |  |  |  | 232,657 |  |  |  | 5,040 |  |  |  | 2,467 |  |  |  | 235,230 |
Corporate debt securities |  |  | 5,697 |  |  |  | 0 |  |  |  | 16 |  |  |  | 5,681 |  |  |  | 5,716 |  |  |  | 2 |  |  |  | 31 |  |  |  | 5,687 |
Government agency collateralized mortgage obligations |  |  | 8,516 |  |  |  | 293 |  |  |  | 0 |  |  |  | 8,809 |  |  |  | 9,225 |  |  |  | 310 |  |  |  | 0 |  |  |  | 9,535 |
Marketable equity securities |  |  | 251 |  |  |  | 203 |  |  |  | 0 |  |  |  | 454 |  |  |  | 252 |  |  |  | 200 |  |  |  | 0 |  |  |  | 452 |
Total available-for-sale portfolio |  | $ | 2,695,204 |  |  | $ | 49,983 |  |  | $ | 4,297 |  |  | $ | 2,740,890 |  |  | $ | 2,706,863 |  |  | $ | 47,463 |  |  | $ | 5,670 |  |  | $ | 2,748,656 |
Other Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal Home Loan Bank common stock |  | $ | 5,590 |  |  |  |  |  |  |  |  |  |  | $ | 5,590 |  |  | $ | 12,191 |  |  |  |  |  |  |  |  |  |  | $ | 12,191 |
Federal Reserve Bank common stock |  |  | 19,781 |  |  |  |  |  |  |  |  |  |  |  | 19,781 |  |  |  | 19,781 |  |  |  |  |  |  |  |  |  |  |  | 19,781 |
Certificates of deposit |  |  | 18,758 |  |  |  |  |  |  |  |  |  |  |  | 18,758 |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  | 0 |
Other equity securities |  |  | 3,699 |  |  |  |  |  |  |  |  |  |  |  | 3,699 |  |  |  | 3,764 |  |  |  |  |  |  |  |  |  |  |  | 3,764 |
Total other securities |  | $ | 47,828 |  |  |  |  |  |  |  |  |  |  | $ | 47,828 |  |  | $ | 35,736 |  |  |  |  |  |  |  |  |  |  | $ | 35,736 |
Summary of Investment Securities That Have Been in a Continuous Unrealized Loss Position for Less Than or Greater Than Twelve Months | A summary of investment securities that have been in a continuous unrealized loss position is as follows: As of March 31, 2017
|  | Less than 12 Months |  |  | 12 Months or Longer |  |  | Total |
(000's omitted) |  |  | # |  |  | Fair Value |  |  | Gross Unrealized Losses |  |  |  | # |  |  | Fair Value |  |  | Gross Unrealized Losses |  |  |  | # |  |  | Fair Value |  |  | Gross Unrealized Losses |
Available-for-Sale Portfolio: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and agency securities |  |  | 7 |  |  | $ | 258,008 |  |  | $ | 1,106 |  |  |  | 0 |  |  | $ | 0 |  |  | $ | 0 |  |  |  | 7 |  |  | $ | 258,008 |  |  | $ | 1,106 |
Obligations of state and political subdivisions |  |  | 75 |  |  |  | 40,177 |  |  |  | 446 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 75 |  |  |  | 40,177 |  |  |  | 446 |
Government agency mortgage-backed securities |  |  | 67 |  |  |  | 95,749 |  |  |  | 1,866 |  |  |  | 14 |  |  |  | 21,228 |  |  |  | 863 |  |  |  | 81 |  |  |  | 116,977 |  |  |  | 2,729 |
Corporate debt securities |  |  | 1 |  |  |  | 2,677 |  |  |  | 16 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 1 |  |  |  | 2,677 |  |  |  | 16 |
Government agency collateralized mortgage obligations |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 2 |  |  |  | 2 |  |  |  | 0 |  |  |  | 2 |  |  |  | 2 |  |  |  | 0 |
Total available-for-sale investment portfolio |  |  | 150 |  |  | $ | 396,611 |  |  | $ | 3,434 |  |  |  | 16 |  |  | $ | 21,230 |  |  | $ | 863 |  |  |  | 166 |  |  | $ | 417,841 |  |  | $ | 4,297 |
As of December 31, 2016
|  | Less than 12 Months |  |  | 12 Months or Longer |  |  | Total |
(000's omitted) |  |  | # |  |  | Fair Value |  |  | Gross Unrealized Losses |  |  |  | # |  |  | Fair Value |  |  | Gross Unrealized Losses |  |  |  | # |  |  | Fair Value |  |  | Gross Unrealized Losses |
Available-for-Sale Portfolio: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and agency securities |  |  | 13 |  |  | $ | 449,242 |  |  | $ | 2,118 |  |  |  | 0 |  |  | $ | 0 |  |  | $ | 0 |  |  |  | 13 |  |  | $ | 449,242 |  |  | $ | 2,118 |
Obligations of state and political subdivisions |  |  | 197 |  |  |  | 102,106 |  |  |  | 1,054 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 197 |  |  |  | 102,106 |  |  |  | 1,054 |
Government agency mortgage-backed securities |  |  | 57 |  |  |  | 83,862 |  |  |  | 1,637 |  |  |  | 15 |  |  |  | 21,788 |  |  |  | 830 |  |  |  | 72 |  |  |  | 105,650 |  |  |  | 2,467 |
Corporate debt securities |  |  | 1 |  |  |  | 2,677 |  |  |  | 31 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 1 |  |  |  | 2,677 |  |  |  | 31 |
Government agency collateralized mortgage obligations |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 2 |  |  |  | 2 |  |  |  | 0 |  |  |  | 2 |  |  |  | 2 |  |  |  | 0 |
Total available-for-sale investment portfolio |  |  | 268 |  |  | $ | 637,887 |  |  | $ | 4,840 |  |  |  | 17 |  |  | $ | 21,790 |  |  | $ | 830 |  |  |  | 285 |  |  | $ | 659,677 |  |  | $ | 5,670 |
Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity | The amortized cost and estimated fair value of debt securities at March 31, 2017, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may 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.
|  | Available-for-Sale |
(000's omitted) |  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 38,222 |  |  | $ | 38,447 |
Due after one through five years |  |  | 1,199,564 |  |  |  | 1,221,056 |
Due after five years through ten years |  |  | 1,041,199 |  |  |  | 1,058,066 |
Due after ten years |  |  | 170,195 |  |  |  | 175,004 |
Subtotal |  |  | 2,449,180 |  |  |  | 2,492,573 |
Government agency mortgage-backed securities |  |  | 237,257 |  |  |  | 239,054 |
Government agency collateralized mortgage obligations |  |  | 8,516 |  |  |  | 8,809 |
Total |  | $ | 2,694,953 |  |  | $ | 2,740,436 |

X
- Definition A table of investments, shown as a text block. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 6 -Section 10 -Paragraph (c) -Subparagraph (1) + Details
Name: | invest_InvestmentTableTextBlock
Namespace Prefix: | invest_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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=73527792&loc=d3e27290-111563 + Details
Name: | us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration