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v2.4.0.8

Consolidated Statement of Shareholders' Investment (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance (in shares) |  | 143,076,357 |  |  | 143,076,357 |  |
Beginning balance |  | $ 1,120,960,556 |  | $ 1,027,118,521 | $ 1,120,960,556 | $ 1,027,118,521 | $ 893,530,826
Issuance of common stock and the tax benefit of stock plan transactions |  |  |  |  | 42,822,635 | 12,208,881 | 33,304,762
Repurchases of common stock |  |  |  |  |  | (33,716,725) |
Stock-based compensation expense related to stock options, employee stock purchases and restricted stock |  |  |  |  | 17,427,233 | 16,433,837 | 14,197,557
Dividends declared ($.48, $.52, and $.56 per share for the years ended December 31, 2011, 2012 and 2013 respectively) |  |  |  |  | (80,941,342) | (74,699,306) | (68,808,152)
Net Income | 69,881,000 | 45,431,000 | 39,599,000 | 46,345,000 | 222,929,949 | 168,586,840 | 164,668,228
Other comprehensive income |  |  |  |  | 4,404,652 | 5,028,508 | (9,774,700)
Ending balance (in shares) | 145,578,023 |  | 143,076,357 |  | 145,578,023 | 143,076,357 |
Ending balance | 1,327,603,683 |  | 1,120,960,556 |  | 1,327,603,683 | 1,120,960,556 | 1,027,118,521
Common Stocks |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance (in shares) |  | 143,076,357 |  | 144,069,563 | 143,076,357 | 144,069,563 | 142,292,127
Beginning balance |  | 8,584,581 |  | 8,644,174 | 8,584,581 | 8,644,174 | 8,537,528
Issuance of common stock and the tax benefit of stock plan transactions (in shares) |  |  |  |  | 2,501,666 | 978,623 | 1,777,436
Issuance of common stock and the tax benefit of stock plan transactions |  |  |  |  | 150,100 | 58,717 | 106,646
Repurchases of common stock (in shares) |  |  |  |  |  | (1,971,829) |
Repurchases of common stock |  |  |  |  |  | (118,310) |
Ending balance (in shares) | 145,578,023 |  | 143,076,357 |  | 145,578,023 | 143,076,357 | 144,069,563
Ending balance | 8,734,681 |  | 8,584,581 |  | 8,734,681 | 8,584,581 | 8,644,174
Additional Paid-In Capital |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | 418,766,010 |  | 395,229,891 | 418,766,010 | 395,229,891 | 347,834,218
Issuance of common stock and the tax benefit of stock plan transactions |  |  |  |  | 42,672,535 | 12,150,164 | 33,198,116
Repurchases of common stock |  |  |  |  |  | (5,047,882) |
Stock-based compensation expense related to stock options, employee stock purchases and restricted stock |  |  |  |  | 17,427,233 | 16,433,837 | 14,197,557
Ending balance | 478,865,778 |  | 418,766,010 |  | 478,865,778 | 418,766,010 | 395,229,891
Retained Earnings |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | 676,039,254 |  | 610,702,253 | 676,039,254 | 610,702,253 | 514,842,177
Repurchases of common stock |  |  |  |  |  | (28,550,533) |
Dividends declared ($.48, $.52, and $.56 per share for the years ended December 31, 2011, 2012 and 2013 respectively) |  |  |  |  | (80,941,342) | (74,699,306) | (68,808,152)
Net Income |  |  |  |  | 222,929,949 | 168,586,840 | 164,668,228
Ending balance | 818,027,861 |  | 676,039,254 |  | 818,027,861 | 676,039,254 | 610,702,253
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | 17,570,711 |  | 12,542,203 | 17,570,711 | 12,542,203 | 22,316,903
Other comprehensive income |  |  |  |  | 4,404,652 | 5,028,508 | (9,774,700)
Ending balance | $ 21,975,363 |  | $ 17,570,711 |  | $ 21,975,363 | $ 17,570,711 | $ 12,542,203

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