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Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Total | Common Shares [Member] | Treasury Stock [Member] | Additional Paid in Capital [Member] | Accumulated Retained Earnings [Member] | Accumulated Other Comprehensive Income [Member]
--- | --- | --- | --- | --- | --- | ---
Balance at at Jun. 30, 2010 | $ 887,878 | $ 602,868 | $ (14,000) | $ 61,298 | $ 193,691 | $ 44,021
Balance (in shares) at Jun. 30, 2010 |  | 56,826,000 | (308,000) |  |  |
Issuance of Common Shares |  |  |  |  |  |
Under employee stock option plans (in shares) |  | 439,000 |  |  |  |
Under employee stock option plans | 10,090 | 10,090 |  |  |  |
Under employee stock purchase plans (in shares) |  | 31,000 |  |  |  |
Under employee stock purchase plans | 1,202 | 1,202 |  |  |  |
In connection with acquisitions (in shares) |  | 6,000 |  |  |  |
In connection with acquisitions |  | 119 |  | (119) |  |
Stock compensation | 11,234 |  |  | 11,234 |  |
Income tax effect related to stock options exercised | 1,888 |  |  | 1,888 |  |
Purchase of treasury stock (in shares) | (264,834) |  | (264,000) |  |  |
Purchase of treasury stock | (12,499) |  | (12,499) |  |  |
Other comprehensive income (loss) - net | 16,449 |  |  |  |  | 16,449
Net income for the period | 123,203 |  |  |  | 123,203 |
Balance at at Jun. 30, 2011 | 1,039,445 | 614,279 | (26,499) | 74,301 | 316,894 | 60,470
Balance (in shares) at Jun. 30, 2011 |  | 57,302,000 | (572,000) |  |  |
Issuance of Common Shares |  |  |  |  |  |
Under employee stock option plans (in shares) | 1,022,556 | 1,023,000 |  |  |  |
Under employee stock option plans | 19,217 | 19,217 |  |  |  |
Under employee stock purchase plans (in shares) |  | 33,000 |  |  |  |
Under employee stock purchase plans | 1,792 | 1,792 |  |  |  |
In connection with acquisitions (in shares) |  | 1,000 |  |  |  |
In connection with acquisitions | 0 | 33 |  | (33) |  |
Stock compensation | 18,062 |  |  | 18,062 |  |
Income tax effect related to stock options exercised | 2,696 |  |  | 2,696 |  |
Purchase of treasury stock (in shares) | (221,081) |  | (221,000) |  |  |
Purchase of treasury stock | (10,888) |  | (10,888) |  |  |
Other comprehensive income (loss) - net | (16,106) |  |  |  |  | (16,106)
Net income for the period | 125,174 |  |  |  | 125,174 |
Balance at at Jun. 30, 2012 | 1,179,392 | 635,321 | (37,387) | 95,026 | 442,068 | 44,364
Balance (in shares) at Jun. 30, 2012 |  | 58,359,000 | (793,000) |  |  |
Issuance of Common Shares |  |  |  |  |  |
Under employee stock option plans (in shares) | 627,305 | 627,000 |  |  |  |
Under employee stock option plans | 14,205 | 14,205 |  |  |  |
Under employee stock purchase plans (in shares) |  | 42,000 |  |  |  |
Under employee stock purchase plans | 2,095 | 2,095 |  |  |  |
In connection with acquisitions (in shares) |  | 1,000 |  |  |  |
In connection with acquisitions | 0 | 21 |  | (21) |  |
Stock compensation | 15,575 |  |  | 15,575 |  |
Income tax effect related to stock options exercised | (402) |  |  | (402) |  |
Purchase of treasury stock (in shares) | 0 |  |  |  |  |
Issuance of treasury stock (in shares) |  |  | 182,000 |  |  |
Issuance of treasury stock | 0 |  | 8,313 | (8,313) |  |
Dividend | (17,703) |  |  |  | (17,703) |
Other comprehensive income (loss) - net | (4,474) |  |  |  |  | (4,474)
Net income for the period | 148,520 |  |  |  | 148,520 |
Balance at at Jun. 30, 2013 | $ 1,337,208 | $ 651,642 | $ (29,074) | $ 101,865 | $ 572,885 | $ 39,890
Balance (in shares) at Jun. 30, 2013 |  | 59,029,000 | (611,000) |  |  |

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