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Consolidated Statements of Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011
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Consolidated Statements of Condition |  |
Held-to-maturity, Market value (in dollars) | $ 2,425 | $ 2,450
Available-for-sale, Amortized cost (in dollars) | 5,077,867 | 5,082,095
Series A Cumulative perpetual preferred shares, par value (in dollars per share) | $ 0.01 | $ 0.01
Series A Cumulative perpetual preferred shares, per share liquidation value (in dollars per share) | $ 1,000 | $ 1,000
Series A Cumulative perpetual preferred shares, Authorized shares | 25,000,000 | 25,000,000
Series A Cumulative perpetual preferred shares, issued shares | 216,000 | 216,000
Series A Cumulative perpetual preferred shares, discount (in dollars) | 4,154 | 5,452
Common shares, par value (in dollars per share) | $ 1.00 | $ 1.00
Common shares, Authorized shares | 275,000,000 | 275,000,000
Common shares, issued shares | 95,722,817 | 95,719,652
Accumulated other comprehensive income, comprehensive loss related to other-than-temporary impairment for non-credit related issues (in dollars) | $ (7,498) | $ (6,889)
Treasury, shares | 28,494,286 | 28,441,714

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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FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 7 -Footnote 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 -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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