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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: 46,603 - 2012; 47,488 - 2011) |  | 95 | 716 |  |  |
Stock purchase and compensation plans (shares: 667,500 - 2012; 577,745 - 2011) |  | 1,156 | 6,860 |  |  |
Net income | 21,967 |  |  | 21,967 |  |
Net income at Jan. 01, 2011 (As Previously Reported [Member]) | 23,874 |  |  |  |  |
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]) | (1,907) |  |  |  |  |
Dividends to stockholders ($0.26 per share - 2012 and 2011) |  |  |  | (14,370) |  |
Other comprehensive income | 14,120 |  |  |  | 14,120 |
Acquisition of treasury stock (shares: 173,620 - 2012; 136,904 - 2011) |  |  |  |  |  | (2,526)
End of period at Jun. 30, 2011 | 1,046,059 | 193,976 | 252,189 | 1,130,684 | 21,144 | (551,934)
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: 46,603 - 2012; 47,488 - 2011) |  | 93 | 712 |  |  |
Stock purchase and compensation plans (shares: 667,500 - 2012; 577,745 - 2011) |  | 1,334 | 7,647 |  |  |
Net income | 18,381 |  |  | 18,381 |  |
Dividends to stockholders ($0.26 per share - 2012 and 2011) |  |  |  | (14,557) |  |
Other comprehensive income | 16,210 |  |  |  | 16,210 |
Acquisition of treasury stock (shares: 173,620 - 2012; 136,904 - 2011) |  |  |  |  |  | (3,102)
End of period at Jun. 30, 2012 | $ 1,085,046 | $ 195,921 | $ 265,729 | $ 1,120,143 | $ 58,504 | $ (555,251)

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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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