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Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands | Total | Common Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Non-controlling Interest [Member]
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2012 | $ 1,166,167,000 | $ 24,814,000 | $ 1,094,690,000 | $ 46,663,000 | $ 0
Net income | 93,603,000 | 0 | 94,341,000 |  | (738,000)
Other comprehensive income (loss): |  |  |  |  |
Unrealized holding gains (losses) on available-for-sale securities, net | 3,000 | 0 | 0 | 3,000 | 0
Unrealized gains (losses) on derivative transactions, net | (1,261,000) | 0 | 0 | (1,261,000) | 0
Foreign currency translation adjustments, net | (9,861,000) | 0 | 0 | (10,045,000) | 184,000
Cash dividends | (31,298,000) | 0 | (31,298,000) |  | 0
Issuance of common stock under employee stock plans, net | 17,246,000 | 17,246,000 |  |  | 0
Capital contribution from non-controlling interest | 8,000,000 | 0 | 0 | 0 | 8,000,000
Tax adjustment from stock plans | 1,387,000 | 1,387,000 |  |  | 0
Stock-based compensation expense | 8,878,000 | 8,878,000 |  |  | 0
Balance at Dec. 31, 2013 | 1,252,864,000 | $ 52,325,000 | 1,157,733,000 | 35,360,000 | 7,446,000
Balance, shares at Dec. 31, 2012 |  | 68,150 |  |  |
Other comprehensive income (loss): |  |  |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures |  | 1,040 |  |  |
Balance, shares at Dec. 31, 2013 |  | 69,190 |  |  |
Net income | 141,859,000 | $ 0 | 137,173,000 |  | 4,686,000
Other comprehensive income (loss): |  |  |  |  |
Unrealized holding gains (losses) on available-for-sale securities, net | 10,000 | 0 | 0 | 10,000 | 0
Unrealized gains (losses) on derivative transactions, net | 7,751,000 | 0 | 0 | 7,751,000 | 0
Foreign currency translation adjustments, net | (27,789,000) | 0 | 0 | (27,288,000) | (501,000)
Cash dividends | (39,836,000) | 0 | (39,836,000) |  | 0
Issuance of common stock under employee stock plans, net | 19,136,000 | 19,136,000 |  |  | 0
Tax adjustment from stock plans | 5,119,000 | 5,119,000 |  |  | 0
Stock-based compensation expense | 11,120,000 | 11,120,000 |  |  | 0
Repurchase of common stock | (15,000,000) | (15,000,000) |  |  | 0
Balance at Dec. 31, 2014 | $ 1,355,234,000 | $ 72,700,000 | 1,255,070,000 | 15,833,000 | 11,631,000
Other comprehensive income (loss): |  |  |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures |  | 1,059 |  |  |
Stock Repurchased During Period, Shares |  | (421) |  |  |
Balance, shares at Dec. 31, 2014 | 69,828 | 69,828 |  |  |
Net income | $ 179,851,000 | $ 0 | 174,337,000 |  | 5,514,000
Other comprehensive income (loss): |  |  |  |  |
Unrealized holding gains (losses) on available-for-sale securities, net | (6,000) | 0 | 0 | (6,000) | 0
Unrealized gains (losses) on derivative transactions, net | (2,908,000) | 0 | 0 | (2,908,000) | 0
Foreign currency translation adjustments, net | (34,887,000) | 0 | 0 | (33,755,000) | (1,132,000)
Cash dividends | (43,547,000) | 0 | (43,547,000) |  | 0
Issuance of common stock under employee stock plans, net | 12,547,000 | 12,547,000 |  |  | 0
Tax adjustment from stock plans | 7,925,000 | 7,925,000 |  |  | 0
Stock-based compensation expense | 11,672,000 | 11,672,000 |  |  | 0
Repurchase of common stock | (70,068,000) | (70,068,000) |  |  | 0
Balance at Dec. 31, 2015 | $ 1,415,813,000 | $ 34,776,000 | $ 1,385,860,000 | $ (20,836,000) | $ 16,013,000
Other comprehensive income (loss): |  |  |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures |  | 835 |  |  |
Stock Repurchased During Period, Shares |  | (1,386) |  |  |
Balance, shares at Dec. 31, 2015 | 69,277 | 69,277 |  |  |

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