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Consolidated Statements of Stockholders' Equity (USD $) In Thousands | Total | Common stock [Member] | Additional paid-in capital [Member] | Retained earnings [Member] | Accumulated other comprehensive income [Member] | Treasury stock [Member]
--- | --- | --- | --- | --- | --- | ---
Beginning of year at Dec. 31, 2010 (As Previously Reported [Member]) |  |  |  | $ 1,176,155 |  |
Beginning of year (Add: Adjustment for the cumulative effect on prior years of applying retroactively the new method of accounting for deferred policy acquisition costs [Member]) |  |  |  | (53,068) |  |
Beginning of year at Dec. 31, 2010 |  | 192,725 | 244,613 | 1,123,087 | 7,024 | (549,408)
Dividend reinvestment plan (shares: 68,640 - 2012; 74,777 - 2011) |  | 150 | 1,066 |  |  |
Stock purchase and compensation plans (shares: 698,723 - 2012; 607,059 - 2011) |  | 1,214 | 8,260 |  |  |
Net income | 3,999 |  |  | 3,999 |  |
Net income at Jan. 01, 2011 (As Previously Reported [Member]) | 3,732 |  |  |  |  |
Net income (Add: Adjustment for the cumulative effect on prior years of applying retroactively the new method of accounting for deferred policy acquisition costs [Member]) | 267 |  |  |  |  |
Dividends to stockholders ($0.39 per share - 2012 and 2011) |  |  |  | (21,579) |  |
Other comprehensive income |  |  |  |  | 25,140 |
Acquisition of treasury stock (shares: 176,513 - 2012; 137,667 - 2011) |  |  |  |  |  | (2,537)
End of period at Sep. 30, 2011 | 1,033,754 | 194,089 | 253,939 | 1,105,507 | 32,164 | (551,945)
Beginning of year at Dec. 31, 2011 (As Previously Reported [Member]) |  |  |  | 1,116,319 |  |
Beginning of year (Add: Adjustment for the cumulative effect on prior years of applying retroactively the new method of accounting for deferred policy acquisition costs [Member]) |  |  |  | 0 |  |
Beginning of year at Dec. 31, 2011 | 1,058,328 | 194,494 | 257,370 | 1,116,319 | 42,294 | (552,149)
Dividend reinvestment plan (shares: 68,640 - 2012; 74,777 - 2011) |  | 137 | 1,064 |  |  |
Stock purchase and compensation plans (shares: 698,723 - 2012; 607,059 - 2011) |  | 1,397 | 9,093 |  |  |
Net income | 36,655 |  |  | 36,655 |  |
Dividends to stockholders ($0.39 per share - 2012 and 2011) |  |  |  | (21,859) |  |
Other comprehensive income | 42,717 |  |  |  | 42,717 |
Acquisition of treasury stock (shares: 176,513 - 2012; 137,667 - 2011) |  |  |  |  |  | (3,154)
End of period at Sep. 30, 2012 | $ 1,124,378 | $ 196,028 | $ 267,527 | $ 1,131,115 | $ 85,011 | $ (555,303)

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- Definition Represents total other comprehensive income or loss for the period, net of tax. Includes deferred gains (losses) on qualifying hedges, unrealized holding gains (losses) on investment securities, certain changes in the liability for defined benefit pension plans, the portion of other-than-temporary impairments recognized in other comprehensive income, and translation adjustments. + References No definition available. + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + 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 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=6228006&loc=d3e74512-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E + Details
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