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Unaudited Condensed Consolidated Statement of Equity Statement - USD ($) $ in Thousands | Total | Common Stock | Treasury Stock | Capital in Excess of Par Value | Accumulated Deficit | Accumulated Other Comprehensive Income (Loss) | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2014 | $ 1,377,378 | $ 205,458 | $ (591) | $ 1,186,304 | $ (81,859) | $ 59,414 | $ 8,652
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |
Comprehensive income | 38,832 | 0 | 0 | 0 | 61,375 | (22,617) | 74
Dividends declared on common stock | (20,461) | 0 | 0 | (20,461) | 0 | 0 | 0
Employee share-based compensation earned | 4,023 | 0 | 0 | 4,023 | 0 | 0 | 0
Stock option exercises | 9,445 | 873 | 0 | 8,572 | 0 | 0 | 0
Restricted stock awards, net of forfeitures | 0 | 254 | 0 | (254) | 0 | 0 | 0
Purchase of Company common stock | (73,180) | 0 | (3,085) | (17,808) | (52,287) | 0 | 0
Tax Benefits Related to Share-Based Awards | 5,511 | 0 | 0 | 5,511 | 0 | 0 | 0
Other | 8 | 1 | 0 | 7 | 0 | 0 | 0
Balance at end of period at Mar. 31, 2015 | 1,341,556 | 206,586 | (3,676) | 1,165,894 | (72,771) | 36,797 | 8,726
Balance at beginning of period at Dec. 31, 2015 | 1,189,401 | 200,859 | (5,086) | 1,092,106 | (109,351) | 6,164 | 4,709
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |
Comprehensive income | 70,170 | 0 | 0 | 0 | 47,445 | 22,707 | 18
Dividends declared on common stock | (23,324) | 0 | 0 | (23,324) | 0 | 0 | 0
Employee share-based compensation earned | 3,067 | 0 | 0 | 3,067 | 0 | 0 | 0
Stock option exercises | 3,133 | 417 | 0 | 2,716 | 0 | 0 | 0
Restricted stock awards, net of forfeitures | 0 | 242 | (1) | (241) | 0 | 0 | 0
Purchase of Company common stock | (54,632) | 0 | (2,285) | (12,708) | (39,639) | 0 | 0
Tax Benefits Related to Share-Based Awards | 2,258 | 0 | 0 | 2,258 | 0 | 0 | 0
Other | 20 | 2 | 0 | 18 | 0 | 0 | 0
Balance at end of period at Mar. 31, 2016 | $ 1,190,093 | $ 201,520 | $ (7,372) | $ 1,063,892 | $ (101,545) | $ 28,871 | $ 4,727

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