v2.4.0.6

Shareholders' Equity (Details) (USD $) | 0 Months Ended | 12 Months Ended |  | 0 Months Ended
--- | --- | --- | --- | ---
Oct. 27, 2011 | Jul. 28, 2011 | Apr. 27, 2011 | Feb. 03, 2011 | Aug. 11, 2010 | May 05, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Oct. 31, 2011 | Jan. 26, 2012 Dividend Declared [Member] | Aug. 11, 2010 Series A Preferred Stock [Member] | Sep. 01, 2010 Common Stock [Member]
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Redeemed or Called During Period, Shares |  |  |  |  |  |  |  |  |  |  |  | 76,898 |
Stock Redeemed or Called During Period, Value |  |  |  |  |  |  |  | $ 80,200,000 |  |  |  | $ 76,900,000 | $ 3,300,000
Payments for Repurchase of Redeemable Preferred Stock |  |  |  |  |  |  |  |  |  |  |  | 77,800,000 |
Payments for Repurchase of Redeemable Preferred Stock, Accrued and Unpaid Dividends |  |  |  |  |  |  |  |  |  |  |  | 919,000 |
Reduction of Earnings Available to Common Stockholders Upon Repayment of Preferred Stock |  |  |  |  | 2,300,000 |  |  |  |  |  |  |  |
Declared quarterly cash dividend | $ 0.08 | $ 0.06 | $ 0.05 | $ 0.03 |  |  |  |  |  |  | $ 0.08 |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |
Stock Repurchased During Period, Shares |  |  |  |  |  |  | 0 |  |  |  |  |  |
Stock Repurchase Program Number Of Shares Repurchased As Of Balance Sheet Date |  |  |  |  |  |  | 64,788 |  |  |  |  |  |
Special cash dividend payable | $ 0.05 |  |  |  |  |  |  |  |  |  | $ 0.29 |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  |  | 11,040,000 |  |  |  |  |  |  |
Stock Issued During Period, New Issues, Price Per Share |  |  |  |  |  | $ 21.75 |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  | 240,100,000 |  | 229,129,000 | 113,537,000 |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  | $ 229,100,000 | $ 0 | $ 229,129,000 | $ 113,537,000 |  |  |  |

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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 1 -Section B -Paragraph 11A -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. + Details
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