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Securities (Details) (USD $) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Mar. 31, 2012 | Dec. 31, 2011 | Mar. 31, 2011 | Dec. 31, 2010
Amortized cost and fair value of investments classified as available for sale |  |  |  |  |  |  |  |
Amortized Cost | $ 636,877,000 |  | $ 636,877,000 |  |  | $ 645,054,000 |  |
Unrealized Gains | 31,367,000 |  | 31,367,000 |  |  | 30,654,000 |  |
Unrealized Losses | (9,493,000) |  | (9,493,000) |  |  | (9,421,000) |  |
Fair Value | 658,751,000 |  | 658,751,000 |  |  | 666,287,000 |  |
Amortized Cost |  |  |  |  |  |  |  |
Due in one year or less | 7,923,000 |  | 7,923,000 |  |  |  |  |
Due after one but within five years | 41,808,000 |  | 41,808,000 |  |  |  |  |
Due after five but within ten years | 88,072,000 |  | 88,072,000 |  |  |  |  |
Due after ten years | 207,464,000 |  | 207,464,000 |  |  |  |  |
Total of securities having specified maturity period | 345,267,000 |  | 345,267,000 |  |  |  |  |
Mortgage-backed securities and equities | 291,610,000 |  | 291,610,000 |  |  |  |  |
Total | 636,877,000 |  | 636,877,000 |  |  | 645,054,000 |  |
Fair Value |  |  |  |  |  |  |  |
Due in one year or less | 8,038,000 |  | 8,038,000 |  |  |  |  |
Due after one but within five years | 43,713,000 |  | 43,713,000 |  |  |  |  |
Due after five but within ten years | 93,252,000 |  | 93,252,000 |  |  |  |  |
Due after ten years | 206,985,000 |  | 206,985,000 |  |  |  |  |
Total of securities having specified maturities period | 351,988,000 |  | 351,988,000 |  |  |  |  |
Mortgage-backed securities and equities | 306,763,000 |  | 306,763,000 |  |  |  |  |
TOTAL | 658,751,000 |  | 658,751,000 |  |  | 666,287,000 |  |
Gain on sale of investments | 660,000 |  | 664,000 | 7,000 |  |  |  |
OTTI losses recognized on investments | 11,000 | 97,000 | 11,000 | 97,000 |  |  |  |
Less Than 12 Months |  |  |  |  |  |  |  |
Fair Value | 21,290,000 |  | 21,290,000 |  |  | 1,110,000 |  |
Unrealized Losses | (119,000) |  | (119,000) |  |  | (11,000) |  |
More Than 12 Months |  |  |  |  |  |  |  |
Fair Value | 3,208,000 |  | 3,208,000 |  |  | 3,603,000 |  |
Unrealized Losses | (9,374,000) |  | (9,374,000) |  |  | (9,410,000) |  |
Total |  |  |  |  |  |  |  |
Fair Value | 24,498,000 |  | 24,498,000 |  |  | 4,713,000 |  |
Total Unrealised Losses | (9,493,000) |  | (9,493,000) |  |  | (9,421,000) |  |
Cumulative OTTI charges | 14,983,000 | 15,167,000 | 14,983,000 | 15,167,000 | 15,180,000 | 15,180,000 | 15,070,000 | 15,070,000
Loss on sale of investments | 4,000 |  | 4,000 |  |  |  |  |
Maximum | Standard & Poors |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |
Credit quality pricing (as a percent) | 65.10% |  | 65.10% |  |  |  |  |
Maximum | Moody Investor Service |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |
Credit quality pricing (as a percent) | 94.54% |  | 94.54% |  |  |  |  |
Minimum | Standard & Poors |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |
Credit quality pricing (as a percent) | 2.30% |  | 2.30% |  |  |  |  |
Minimum | Moody Investor Service |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |
Credit quality pricing (as a percent) | 0.06% |  | 0.06% |  |  |  |  |
U.S. Government agencies |  |  |  |  |  |  |  |
Amortized cost and fair value of investments classified as available for sale |  |  |  |  |  |  |  |
Amortized Cost | 1,899,000 |  | 1,899,000 |  |  | 3,979,000 |  |
Unrealized Gains | 85,000 |  | 85,000 |  |  | 34,000 |  |
Fair Value | 1,984,000 |  | 1,984,000 |  |  | 4,013,000 |  |
Amortized Cost |  |  |  |  |  |  |  |
Total | 1,899,000 |  | 1,899,000 |  |  | 3,979,000 |  |
Mortgage Backed Securities - Residential |  |  |  |  |  |  |  |
Amortized cost and fair value of investments classified as available for sale |  |  |  |  |  |  |  |
Amortized Cost | 291,240,000 |  | 291,240,000 |  |  | 296,646,000 |  |
Unrealized Gains | 15,152,000 |  | 15,152,000 |  |  | 15,142,000 |  |
Fair Value | 306,392,000 |  | 306,392,000 |  |  | 311,788,000 |  |
Amortized Cost |  |  |  |  |  |  |  |
Total | 291,240,000 |  | 291,240,000 |  |  | 296,646,000 |  |
Mortgage Backed Securities - Commercial |  |  |  |  |  |  |  |
Amortized cost and fair value of investments classified as available for sale |  |  |  |  |  |  |  |
Amortized Cost | 50,000 |  | 50,000 |  |  | 98,000 |  |
Unrealized Gains | 1,000 |  | 1,000 |  |  | 3,000 |  |
Fair Value | 51,000 |  | 51,000 |  |  | 101,000 |  |
Amortized Cost |  |  |  |  |  |  |  |
Total | 50,000 |  | 50,000 |  |  | 98,000 |  |
Collateralized Mortgage Obligations |  |  |  |  |  |  |  |
Amortized cost and fair value of investments classified as available for sale |  |  |  |  |  |  |  |
Amortized Cost | 143,679,000 |  | 143,679,000 |  |  | 144,850,000 |  |
Unrealized Gains | 3,399,000 |  | 3,399,000 |  |  | 3,097,000 |  |
Unrealized Losses | (34,000) |  | (34,000) |  |  |  |  |
Fair Value | 147,044,000 |  | 147,044,000 |  |  | 147,947,000 |  |
Amortized Cost |  |  |  |  |  |  |  |
Total | 143,679,000 |  | 143,679,000 |  |  | 144,850,000 |  |
Less Than 12 Months |  |  |  |  |  |  |  |
Fair Value | 13,552,000 |  | 13,552,000 |  |  |  |  |
Unrealized Losses | (34,000) |  | (34,000) |  |  |  |  |
Total |  |  |  |  |  |  |  |
Fair Value | 13,552,000 |  | 13,552,000 |  |  |  |  |
Total Unrealised Losses | (34,000) |  | (34,000) |  |  |  |  |
State and Municipal Obligations |  |  |  |  |  |  |  |
Amortized cost and fair value of investments classified as available for sale |  |  |  |  |  |  |  |
Amortized Cost | 186,180,000 |  | 186,180,000 |  |  | 183,854,000 |  |
Unrealized Gains | 12,486,000 |  | 12,486,000 |  |  | 11,738,000 |  |
Unrealized Losses | (85,000) |  | (85,000) |  |  | (11,000) |  |
Fair Value | 198,581,000 |  | 198,581,000 |  |  | 195,581,000 |  |
Amortized Cost |  |  |  |  |  |  |  |
Total | 186,180,000 |  | 186,180,000 |  |  | 183,854,000 |  |
Less Than 12 Months |  |  |  |  |  |  |  |
Fair Value | 7,738,000 |  | 7,738,000 |  |  | 1,110,000 |  |
Unrealized Losses | (85,000) |  | (85,000) |  |  | (11,000) |  |
Total |  |  |  |  |  |  |  |
Fair Value | 7,738,000 |  | 7,738,000 |  |  | 1,110,000 |  |
Total Unrealised Losses | (85,000) |  | (85,000) |  |  | (11,000) |  |
Collateralized Debt Obligations |  |  |  |  |  |  |  |
Amortized cost and fair value of investments classified as available for sale |  |  |  |  |  |  |  |
Amortized Cost | 13,509,000 |  | 13,509,000 |  |  | 14,031,000 |  |
Unrealized Gains | 244,000 |  | 244,000 |  |  | 150,000 |  |
Unrealized Losses | (9,374,000) |  | (9,374,000) |  |  | (9,410,000) |  |
Fair Value | 4,379,000 |  | 4,379,000 |  |  | 4,771,000 |  |
Amortized Cost |  |  |  |  |  |  |  |
Total | 13,509,000 |  | 13,509,000 |  |  | 14,031,000 |  |
More Than 12 Months |  |  |  |  |  |  |  |
Fair Value | 3,208,000 |  | 3,208,000 |  |  | 3,603,000 |  |
Unrealized Losses | (9,374,000) |  | (9,374,000) |  |  | (9,410,000) |  |
Total |  |  |  |  |  |  |  |
Fair Value | 3,208,000 |  | 3,208,000 |  |  | 3,603,000 |  |
Total Unrealised Losses | (9,374,000) |  | (9,374,000) |  |  | (9,410,000) |  |
Other-than-temporarily impaired CDO |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |
Number of CDO's | 3 |  | 3 |  |  |  |  |
Contractual balance | 28,000,000 |  | 28,000,000 |  |  |  |  |
Reduced balance | 3,700,000 |  | 3,700,000 |  |  |  |  |
Interest payment received | 700,000 |  | 700,000 |  |  |  |  |
Cumulative OTTI charges | 14,900,000 |  | 14,900,000 |  |  |  |  |
Other comprehensive income before tax | 8,700,000 |  | 8,700,000 |  |  |  |  |
Other comprehensive income net of tax | 5,200,000 |  | 5,200,000 |  |  |  |  |
Base discount rate, which is subject to an additional margin |  |  | 3 month LIBOR |  |  |  |  |
Other-than-temporarily impaired CDO | Maximum |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |
Severity of OTTI (as a percent) |  |  | 87.00% |  |  |  |  |
Discount rate, margin on variable rate basis (as a percent) | 1.80% |  | 1.80% |  |  |  |  |
Other-than-temporarily impaired CDO | Minimum |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |
Severity of OTTI (as a percent) |  |  | 28.00% |  |  |  |  |
Discount rate, margin on variable rate basis (as a percent) | 1.60% |  | 1.60% |  |  |  |  |
Pooled trust preferred securities |  |  |  |  |  |  |  |
Amortized cost and fair value of investments classified as available for sale |  |  |  |  |  |  |  |
Amortized Cost | 1,000,000 |  | 1,000,000 |  |  |  |  |
Fair Value | 700,000 |  | 700,000 |  |  |  |  |
Amortized Cost |  |  |  |  |  |  |  |
Total | 1,000,000 |  | 1,000,000 |  |  |  |  |
Equity Securities |  |  |  |  |  |  |  |
Amortized cost and fair value of investments classified as available for sale |  |  |  |  |  |  |  |
Amortized Cost | 320,000 |  | 320,000 |  |  | 1,596,000 |  |
Unrealized Gains |  |  |  |  |  | 490,000 |  |
Fair Value | 320,000 |  | 320,000 |  |  | 2,086,000 |  |
Amortized Cost |  |  |  |  |  |  |  |
Total | 320,000 |  | 320,000 |  |  | 1,596,000 |  |
Fair Value |  |  |  |  |  |  |  |
OTTI losses recognized on investments | $ 11,000 |  |  |  |  |  |  |

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 + Details
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