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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands | Total | Common Stock | Treasury common stock | Additional paid-in capital | Retained earnings | Accumulated other comprehensive income (loss)
--- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2010 | $ 2,223,761 | $ 1,601 | $ (7,512) | $ 1,820,503 | $ 341,699 | $ 67,470
Beginning balance Shares at Dec. 31, 2010 |  | 160,114 |  |  |  |
Issuance of common stock | 8,882 | 12 |  | 8,870 |  |
Issuance of common stock, shares |  | 1,189 |  |  |  |
Stock-based compensation expense | 26,674 |  |  | 26,674 |  |
Tax benefit of stock compensation | 11,676 |  |  | 11,676 |  |
Common dividends declared ($0.16 per share) | (25,756) |  |  |  | (25,756) |
Treasury stock issuance |  |  | 1,169 | (1,169) |  |
Other comprehensive income | 89,157 |  |  |  |  | 89,157
Net income | 58,026 |  |  |  | 58,026 |
Ending balance at Dec. 31, 2011 | 2,392,420 | 1,613 | (6,343) | 1,866,554 | 373,969 | 156,627
Ending balance Shares at Dec. 31, 2011 |  | 161,303 |  |  |  |
Issuance of common stock | 20,264 | 13 |  | 20,251 |  |
Issuance of common stock, shares |  | 1,339 |  |  |  |
Stock-based compensation expense | 30,405 |  |  | 30,405 |  |
Common dividends declared ($0.16 per share) | (25,981) |  |  |  | (25,981) |
Treasury stock issuance |  |  | 1,583 | (1,583) |  |
Other comprehensive income | (72,718) |  |  |  |  | (72,718)
Net income | 13,002 |  |  |  | 13,002 |
Ending balance at Dec. 31, 2012 | 2,357,392 | 1,626 | (4,760) | 1,915,627 | 360,990 | 83,909
Ending balance Shares at Dec. 31, 2012 |  | 162,642 |  |  |  |
Issuance of common stock | 9,289 | 8 |  | 9,281 |  |
Issuance of common stock, shares |  | 799 |  |  |  |
Stock-based compensation expense | 35,851 |  |  | 35,851 |  |
Common dividends declared ($0.16 per share) | (26,129) |  |  |  | (26,129) |
Treasury stock issuance |  |  | 1,123 | (1,123) |  |
Other comprehensive income | (77,673) |  |  |  |  | (77,673)
Net income | 115,722 |  |  |  | 115,722 |
Ending balance at Dec. 31, 2013 | $ 2,414,452 | $ 1,634 | $ (3,637) | $ 1,959,636 | $ 450,583 | $ 6,236
Ending balance Shares at Dec. 31, 2013 |  | 163,441 |  |  |  |

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