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Consolidated Statements of Changes in Equity (USD $) In Thousands, except Share data | Total | Common Stock [Member] | Additional Capital | Retained Earnings [Member] | Accumulated Other Comprehensive Income [Member] | Treasury Stock [Member] | Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Balance, at Dec. 31, 2011 | $ 363,245 | $ 5,173 | $ 31,801 | $ 322,201 |  | $ (375) | $ 4,445
Shares Issued, Beginning Balance at Dec. 31, 2011 |  | 5,173,000 |  |  |  |  |
Net income | 58,010 |  |  | 57,230 |  |  | 780
Dividends paid | (57,458) |  |  | (57,458) |  |  |
Unrealized net loss on available-for-sale securities | 0 |  |  |  |  |  |
Deferred stock unit grant | 300 |  | 300 |  |  |  |
Balance, at Sep. 30, 2012 | 364,097 | 5,173 | 32,101 | 321,973 |  | (375) | 5,225
Shares Issued, Ending Balance at Sep. 30, 2012 |  | 5,173,000 |  |  |  |  |
Balance, at Dec. 31, 2012 | 332,153 | 5,173 | 29,352 | 296,797 | 1,206 | (375) | 0
Shares Issued, Beginning Balance at Dec. 31, 2012 | 5,173,450 | 5,173,450 |  |  |  |  |
Net income | 41,125 |  |  | 41,125 |  |  | 0
Dividends paid | (42,145) |  |  | (42,145) |  |  |
Unrealized net loss on available-for-sale securities | (996) |  |  |  | (996) |  |
Deferred stock unit grant | 394 |  | 394 |  |  |  |
Other | 0 |  | (1) |  |  | 1 |
Balance, at Sep. 30, 2013 | $ 330,531 | $ 5,173 | $ 29,745 | $ 295,777 | $ 210 | $ (374) | $ 0
Shares Issued, Ending Balance at Sep. 30, 2013 | 5,173,450 | 5,173,450 |  |  |  |  |

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