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Consolidated Statements of Stockholders Equity (USD $) | Total | Convertible Preferred Stock [Member] | Common Stock [Member] | Additional Paid-In Capital [Member] | Retained Earnings [Member] | Treasury Stock [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2009 | $ 474,049,000 | $ 330,654,000 | $ 66,000 | $ 94,996,000 | $ 235,726,000 | $ (175,220,000) | $ (12,173,000)
Net income | 107,896,000 |  |  |  | 107,896,000 |  |
Fair value of interest rate swaps, net of tax of $2,425 | 3,957,000 |  |  |  |  |  | 3,957,000
Other comprehensive income from currency exchange, net of tax | 115,000 |  |  |  |  |  | 115,000
Total comprehensive income | 111,968,000 |  |  |  |  |  |
Payment of dividends on convertible preferred stock | (7,635,000) | (7,635,000) |  |  |  |  |
Conversion of convertible preferred stock to common stock in connection with initial public offering |  | (323,019,000) | 45,000 | 279,433,000 | 43,541,000 |  |
Issuance of common stock | 47,563,000 |  | 1,000 | 47,562,000 |  |  |
Balance at Dec. 31, 2010 | 625,945,000 |  | 112,000 | 421,991,000 | 387,163,000 | (175,220,000) | (8,101,000)
Net income | 147,335,000 |  |  |  | 147,335,000 |  |
Other comprehensive income from currency exchange, net of tax | (5,615,000) |  |  |  |  |  | (5,615,000)
Total comprehensive income | 141,720,000 |  |  |  |  |  |
Repurchase of common stock | (443,000) |  |  |  |  | (443,000) |
Issuance of common stock | 44,214,000 |  | 2,000 | 44,212,000 |  |  |
Balance at Dec. 31, 2011 | 811,436,000 |  | 114,000 | 466,203,000 | 534,498,000 | (175,663,000) | (13,716,000)
Net income | 216,199,000 |  |  |  | 216,199,000 |  |
Other comprehensive income from currency exchange, net of tax | 10,370,000 |  |  |  |  |  | 10,370,000
Total comprehensive income | 226,569,000 |  |  |  |  |  |
Repurchase of common stock | (200,000,000) |  |  |  |  | (200,000,000) |
Issuance of common stock | 75,817,000 |  | 2,000 | 75,815,000 |  |  |
Balance at Dec. 31, 2012 | $ 913,822,000 |  | $ 116,000 | $ 542,018,000 | $ 750,697,000 | $ (375,663,000) | $ (3,346,000)

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- Definition The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 -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 AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a -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 AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A5 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=18733213&loc=SL4591552-111686 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 + Details
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