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Securities Available for Sale and Held to Maturity (Tables) | 12 Months Ended
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Dec. 31, 2014
Securities Available for Sale and Held to Maturity [Abstract] |
Amortized cost and estimated fair value of available for sale and held to maturity securities | The following table is a summary of the amortized cost and estimated fair value of securities available for sale and held to maturity at December 31, 2014 and 2013 ($ in thousands):
|  | Securities Available for Sale |  |  | Securities Held to Maturity |
December 31, 2014 |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Estimated Fair Value |  |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Estimated Fair Value |
U.S. Treasury securities |  | $ | 100 |  |  | $ | - |  |  | $ | - |  |  | $ | 100 |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
U.S. Government agency obligations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued by U.S. Government agencies |  |  | 79,788 |  |  |  | 694 |  |  |  | (826 | ) |  |  | 79,656 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Issued by U.S. Government sponsored agencies |  |  | 32,725 |  |  |  | 170 |  |  |  | (77 | ) |  |  | 32,818 |  |  |  | 100,971 |  |  |  | 2,631 |  |  |  | - |  |  |  | 103,602 |
Obligations of states and political subdivisions |  |  | 157,001 |  |  |  | 5,325 |  |  |  | (68 | ) |  |  | 162,258 |  |  |  | 63,505 |  |  |  | 3,398 |  |  |  | - |  |  |  | 66,903 |
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage pass-through securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed by GNMA |  |  | 11,897 |  |  |  | 544 |  |  |  | (14 | ) |  |  | 12,427 |  |  |  | 19,115 |  |  |  | 466 |  |  |  | (16 | ) |  |  | 19,565 |
Issued by FNMA and FHLMC |  |  | 199,599 |  |  |  | 4,842 |  |  |  | - |  |  |  | 204,441 |  |  |  | 11,437 |  |  |  | 471 |  |  |  | - |  |  |  | 11,908 |
Other residential mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued or guaranteed by FNMA, FHLMC or GNMA |  |  | 1,655,733 |  |  |  | 16,664 |  |  |  | (10,564 | ) |  |  | 1,661,833 |  |  |  | 834,176 |  |  |  | 6,440 |  |  |  | (1,916 | ) |  |  | 838,700 |
Commercial mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued or guaranteed by FNMA, FHLMC or GNMA |  |  | 184,394 |  |  |  | 4,968 |  |  |  | (28 | ) |  |  | 189,334 |  |  |  | 141,481 |  |  |  | 1,750 |  |  |  | (1,063 | ) |  |  | 142,168 |
Asset-backed securities and structured financial products |  |  | 30,776 |  |  |  | 924 |  |  |  | - |  |  |  | 31,700 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total |  | $ | 2,352,013 |  |  | $ | 34,131 |  |  | $ | (11,577 | ) |  | $ | 2,374,567 |  |  | $ | 1,170,685 |  |  | $ | 15,156 |  |  | $ | (2,995 | ) |  | $ | 1,182,846 |
December 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 501 |  |  | $ | 1 |  |  | $ | - |  |  | $ | 502 |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
U.S. Government agency obligations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued by U.S. Government agencies |  |  | 129,653 |  |  |  | 1,125 |  |  |  | (1,485 | ) |  |  | 129,293 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Issued by U.S. Government sponsored agencies |  |  | 40,681 |  |  |  | 19 |  |  |  | (521 | ) |  |  | 40,179 |  |  |  | 100,159 |  |  |  | - |  |  |  | (1,580 | ) |  |  | 98,579 |
Obligations of states and political subdivisions |  |  | 165,810 |  |  |  | 6,243 |  |  |  | (315 | ) |  |  | 171,738 |  |  |  | 65,987 |  |  |  | 2,806 |  |  |  | (281 | ) |  |  | 68,512 |
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage pass-through securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed by GNMA |  |  | 14,099 |  |  |  | 459 |  |  |  | (84 | ) |  |  | 14,474 |  |  |  | 9,433 |  |  |  | 142 |  |  |  | (72 | ) |  |  | 9,503 |
Issued by FNMA and FHLMC |  |  | 239,880 |  |  |  | 3,147 |  |  |  | (1,909 | ) |  |  | 241,118 |  |  |  | 12,724 |  |  |  | 30 |  |  |  | (162 | ) |  |  | 12,592 |
Other residential mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued or guaranteed by FNMA, FHLMC or GNMA |  |  | 1,300,375 |  |  |  | 12,459 |  |  |  | (22,093 | ) |  |  | 1,290,741 |  |  |  | 837,393 |  |  |  | - |  |  |  | (15,072 | ) |  |  | 822,321 |
Commercial mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued or guaranteed by FNMA, FHLMC or GNMA |  |  | 235,317 |  |  |  | 7,278 |  |  |  | (423 | ) |  |  | 242,172 |  |  |  | 143,032 |  |  |  | 85 |  |  |  | (3,791 | ) |  |  | 139,326 |
Asset-backed securities and structured financial products |  |  | 62,689 |  |  |  | 1,248 |  |  |  | - |  |  |  | 63,937 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total |  | $ | 2,189,005 |  |  | $ | 31,979 |  |  | $ | (26,830 | ) |  | $ | 2,194,154 |  |  | $ | 1,168,728 |  |  | $ | 3,063 |  |  | $ | (20,958 | ) |  | $ | 1,150,833 |
Securities with gross unrealized losses, segregated by length of impairment | The table below includes securities with gross unrealized losses segregated by length of impairment at December 31, 2014 and 2013 ($ in thousands):
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
December 31, 2014 |  | Estimated Fair Value |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Gross Unrealized Losses |
U.S. Government agency obligations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued by U.S. Government agencies |  | $ | 19,220 |  |  | $ | (115 | ) |  | $ | 32,656 |  |  | $ | (711 | ) |  | $ | 51,876 |  |  | $ | (826 | )
Issued by U.S. Government sponsored agencies |  |  | 9,948 |  |  |  | (52 | ) |  |  | 9,956 |  |  |  | (25 | ) |  |  | 19,904 |  |  |  | (77 | )
Obligations of states and political subdivisions |  |  | 8,431 |  |  |  | (22 | ) |  |  | 3,800 |  |  |  | (46 | ) |  |  | 12,231 |  |  |  | (68 | )
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage pass-through securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed by GNMA |  |  | 7,199 |  |  |  | (22 | ) |  |  | 647 |  |  |  | (8 | ) |  |  | 7,846 |  |  |  | (30 | )
Other residential mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued or guaranteed by FNMA, FHLMC or GNMA |  |  | 537,033 |  |  |  | (2,449 | ) |  |  | 395,342 |  |  |  | (10,031 | ) |  |  | 932,375 |  |  |  | (12,480 | )
Commercial mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued or guaranteed by FNMA, FHLMC or GNMA |  |  | 9,134 |  |  |  | (3 | ) |  |  | 79,829 |  |  |  | (1,088 | ) |  |  | 88,963 |  |  |  | (1,091 | )
Total |  | $ | 590,965 |  |  | $ | (2,663 | ) |  | $ | 522,230 |  |  | $ | (11,909 | ) |  | $ | 1,113,195 |  |  | $ | (14,572 | )
December 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency obligations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued by U.S. Government agencies |  | $ | 68,908 |  |  | $ | (1,485 | ) |  | $ | - |  |  | $ | - |  |  | $ | 68,908 |  |  | $ | (1,485 | )
Issued by U.S. Government sponsored agencies |  |  | 138,478 |  |  |  | (2,101 | ) |  |  | - |  |  |  | - |  |  |  | 138,478 |  |  |  | (2,101 | )
Obligations of states and political subdivisions |  |  | 55,963 |  |  |  | (586 | ) |  |  | 796 |  |  |  | (10 | ) |  |  | 56,759 |  |  |  | (596 | )
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage pass-through securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed by GNMA |  |  | 14,732 |  |  |  | (155 | ) |  |  | 161 |  |  |  | (1 | ) |  |  | 14,893 |  |  |  | (156 | )
Issued by FNMA and FHLMC |  |  | 118,466 |  |  |  | (2,071 | ) |  |  | - |  |  |  | - |  |  |  | 118,466 |  |  |  | (2,071 | )
Other residential mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued or guaranteed by FNMA, FHLMC or GNMA |  |  | 1,534,381 |  |  |  | (36,750 | ) |  |  | 23,458 |  |  |  | (415 | ) |  |  | 1,557,839 |  |  |  | (37,165 | )
Commercial mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued or guaranteed by FNMA, FHLMC or GNMA |  |  | 177,412 |  |  |  | (4,214 | ) |  |  | - |  |  |  | - |  |  |  | 177,412 |  |  |  | (4,214 | )
Total |  | $ | 2,108,340 |  |  | $ | (47,362 | ) |  | $ | 24,415 |  |  | $ | (426 | ) |  | $ | 2,132,755 |  |  | $ | (47,788 | )
Gains and losses as a result of calls and disposition of securities | For the periods presented, gains and losses as a result of calls and dispositions of securities, as well as any associated proceeds, were as follows ($ in thousands):
|  | Years Ended December 31, |
Available for Sale |  | 2014 |  |  | 2013 |  |  | 2012 |
Proceeds from calls and sales of securities |  | $ | 56,815 |  |  | $ | 224,853 |  |  | $ | 38,364 |
Gross realized gains |  |  | 456 |  |  |  | 1,680 |  |  |  | 1,052 |
Gross realized losses |  |  | (156 | ) |  |  | (1,195 | ) |  |  | (2 | )
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from calls of securities |  | $ | - |  |  | $ | - |  |  | $ | 335 |
Gross realized gains |  |  | - |  |  |  | - |  |  |  | 9 |
Contractual maturities of available for sale and held to maturity securities | The amortized cost and estimated fair value of securities available for sale and held to maturity at December 31, 2014, by contractual maturity, are shown below ($ in thousands). Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
|  | Securities |  |  | Securities |
|  | Available for Sale |  |  | Held to Maturity |
|  |  |  |  | Estimated |  |  |  |  |  | Estimated |
|  | Amortized |  |  | Fair |  |  | Amortized |  |  | Fair |
|  | Cost |  |  | Value |  |  | Cost |  |  | Value |
Due in one year or less |  | $ | 18,088 |  |  | $ | 18,236 |  |  | $ | 2,496 |  |  | $ | 2,513 |
Due after one year through five years |  |  | 137,976 |  |  |  | 142,016 |  |  |  | 11,693 |  |  |  | 12,298 |
Due after five years through ten years |  |  | 61,738 |  |  |  | 63,811 |  |  |  | 137,991 |  |  |  | 142,604 |
Due after ten years |  |  | 82,588 |  |  |  | 82,469 |  |  |  | 12,296 |  |  |  | 13,090 |
|  |  | 300,390 |  |  |  | 306,532 |  |  |  | 164,476 |  |  |  | 170,505 |
Mortgage-backed securities |  |  | 2,051,623 |  |  |  | 2,068,035 |  |  |  | 1,006,209 |  |  |  | 1,012,341 |
Total |  | $ | 2,352,013 |  |  | $ | 2,374,567 |  |  | $ | 1,170,685 |  |  | $ | 1,182,846 |

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- Definition Tabular disclosure of the amortized cost, estimated fair values and corresponding gross unrealized gains and gross unrealized losses, by major security type, for available-for-sale and held-to-maturity investments. Available-for-sale securities consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. + References No definition available. + Details
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- Definition Tabular disclosure of the realized and unrealized gains and losses reported in the statement of income which have resulted from the sale and holding of marketable securities, respectively, as well as the sale or disposal of cost method investments. Such amounts would include realized gains and losses on the sale or disposal of trading, available-for-sale, and held-to-maturity securities, unrealized gains and losses on trading securities, unrealized gains and losses on available-for-sale and held-to-maturity securities transferred to the trading securities category, realized gains and losses on the sale or disposal of cost method investments, and losses recognized for other than temporary impairments (OTTI) of such investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.M) -URI http://asc.fasb.org/extlink&oid=27011274&loc=d3e87990-122713 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (c)-(e) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section M + Details
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