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Consolidated Statements of Shareholders' Equity and Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified | Total | Ordinary Shares | Additional Paid-in Capital | Capital Redemption Reserve | Accumulated Other Comprehensive Income | Retained Earnings
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2010 | $ 669,999 | $ 5,063 | $ 196,960 |  | $ 396 | $ 467,580
Balance (in shares) at Dec. 31, 2010 |  | 60,247,092 |  |  |  |
Comprehensive Income: |  |  |  |  |  |
Net income | 22,880 |  |  |  |  | 22,880
Currency translation adjustment | (11,347) |  |  |  | (11,347) |
Currency impact on long-term funding | (802) |  |  |  | (802) |
Tax on currency impact of long term funding | 294 |  |  |  | 294 |
Unrealized capital gain/loss - investments | (622) |  |  |  | (622) |
Actuarial gain/loss on defined benefit pension plan | (4,365) |  |  |  | (4,365) |
Total comprehensive income | 6,038 |  |  |  |  |
Exercise of share options (in shares) |  | 430,340 |  |  |  |
Exercise of share options | 4,665 | 36 | 4,629 |  |  |
Issue of restricted share units (in shares) |  | 3,768 |  |  |  |
Share based compensation expense | 9,355 |  | 9,355 |  |  |
Share issue costs | (76) |  | (76) |  |  |
Repurchase of ordinary shares (in shares) | (545,597) | (545,597) |  |  |  |
Repurchase of ordinary shares | (9,005) | (44) |  | 44 |  | (9,005)
Share repurchase costs | (113) |  |  |  |  | (113)
Excess tax benefit on exercise of equity compensation | 681 |  | 681 |  |  |
Balance at Dec. 31, 2011 | 681,544 | 5,055 | 211,549 | 44 | (16,446) | 481,342
Balance (in shares) at Dec. 31, 2011 |  | 60,135,603 |  |  |  |
Comprehensive Income: |  |  |  |  |  |
Net income | 55,420 |  |  |  |  | 55,420
Currency translation adjustment | 4,494 |  |  |  | 4,494 |
Currency impact on long-term funding | 1,982 |  |  |  | 1,982 |
Tax on currency impact of long term funding | (356) |  |  |  | (356) |
Unrealized capital gain/loss - investments | 861 |  |  |  | 861 |
Actuarial gain/loss on defined benefit pension plan | 689 |  |  |  | 689 |
Total comprehensive income | 63,090 |  |  |  |  |
Exercise of share options (in shares) |  | 890,236 |  |  |  |
Exercise of share options | 13,015 | 68 | 12,947 |  |  |
Share based compensation expense | 11,521 |  | 11,521 |  |  |
Share issue costs | (74) |  | (74) |  |  |
Repurchase of ordinary shares (in shares) | (738,341) | (738,341) |  |  |  |
Repurchase of ordinary shares | (15,605) | (56) |  | 56 |  | (15,605)
Share repurchase costs | (190) |  |  |  |  | (190)
Excess tax benefit on exercise of equity compensation | 1,274 |  | 1,274 |  |  |
Balance at Dec. 31, 2012 | 754,575 | 5,067 | 237,217 | 100 | (8,776) | 520,967
Balance (in shares) at Dec. 31, 2012 |  | 60,287,498 |  |  |  |
Comprehensive Income: |  |  |  |  |  |
Net income | 102,812 |  |  |  |  | 102,812
Currency translation adjustment | 10,725 |  |  |  | 10,725 |
Currency impact on long-term funding | (1,046) |  |  |  | (1,046) |
Tax on currency impact of long term funding | (87) |  |  |  | (87) |
Unrealized capital gain/loss - investments | (239) |  |  |  | (239) |
Actuarial gain/loss on defined benefit pension plan | 1,383 |  |  |  | 1,383 |
Total comprehensive income | 113,548 |  |  |  |  |
Exercise of share options (in shares) |  | 1,249,759 |  |  |  |
Exercise of share options | 26,989 | 101 | 26,888 |  |  |
Issue of restricted share units (in shares) |  | 50,000 |  |  |  |
Issue of restricted share units | 4 |  | 4 |  |  |
Share based compensation expense | 13,882 |  | 13,882 |  |  |
Share issue costs | (70) |  | (70) |  |  |
Repurchase of ordinary shares (in shares) |  |  |  |  |  |
Repurchase of ordinary shares |  |  |  |  |  |
Excess tax benefit on exercise of equity compensation | 1,651 |  | 1,651 |  |  |
Balance at Dec. 31, 2013 | $ 910,579 | $ 5,168 | $ 279,572 | $ 100 | $ 1,960 | $ 623,779
Balance (in shares) at Dec. 31, 2013 |  | 61,587,257 |  |  |  |

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