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Securities (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | $ 874,954 | $ 668,615
Unrealized Gains | 21,345 | 30,619
Unrealized Losses | (23,624) | (8,234)
Fair Value | 872,675 | 691,000
U.S. Government agencies |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 1,625 | 1,807
Unrealized Gains | 6 | 79
Unrealized Losses | 0 | 0
Fair Value | 1,631 | 1,886
Mortgage Backed Securities - Residential |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 203,624 | 231,316
Unrealized Gains | 8,386 | 13,373
Unrealized Losses | (1,783) | (13)
Fair Value | 210,227 | 244,676
Mortgage Backed Securities - Commercial |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 4,768 | 5,146
Unrealized Gains | 1 | 1
Unrealized Losses | (246) | (16)
Fair Value | 4,523 | 5,131
Collateralized Mortgage Obligations |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 466,978 | 230,739
Unrealized Gains | 1,918 | 2,827
Unrealized Losses | (12,784) | (246)
Fair Value | 456,112 | 233,320
State and Municipal Obligations |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 186,632 | 187,044
Unrealized Gains | 7,011 | 12,518
Unrealized Losses | (1,647) | (77)
Fair Value | 191,996 | 199,485
Collateralized Debt Obligations |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 11,007 | 12,243
Unrealized Gains | 3,681 | 1,761
Unrealized Losses | (7,164) | (7,882)
Fair Value | 7,524 | 6,122
Equity Securities |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 320 | 320
Unrealized Gains | 342 | 60
Unrealized Losses | 0 | 0
Fair Value | $ 662 | $ 380

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + 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=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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