v2.4.0.6

Capital Stock (Details) (USD $) | 12 Months Ended |  | 0 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Nov. 15, 2011 3 7/8% Convertible Senior Notes due 2011 upon maturity | Nov. 30, 2011 3 7/8% Convertible Senior Notes due 2011 upon maturity | Jun. 30, 2012 Common Stock Par Value | Feb. 28, 2011 Common Stock Par Value | Dec. 31, 2012 Common Stock Par Value | Dec. 31, 2011 Common Stock Par Value | Dec. 31, 2012 Funds [Member]
Capital Stock |  |  |  |  |  |  |  |  |  |
Stock repurchased, shares |  |  |  |  |  |  |  |  |  | 3,700,000
Number of shares of common stock issued and sold in an underwritten public offering |  |  |  |  |  | 5,980,000 | 5,563,000 |  |  |
Issuance of common stock | $ 342,469,000 | $ 299,558,000 |  |  |  | $ 342,500,000 |  | $ 1,495,000 | $ 1,627,000 |
Aggregate shares of common stock issued for the conversion value in excess of the principal amount |  |  |  | 943,714 | 943,714 |  |  |  |  |
Principal amount repaid |  |  |  | 230,000,000 |  |  |  |  |  |
Interest rate (as a percent) | 9.00% |  | 7.125% | 3.875% | 3.875% |  |  |  |  |
Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |  |  |
Foreign currency translation | 23,441,000 | 21,066,000 |  |  |  |  |  |  |  |
Unrealized gain on marketable debt securities | 807,000 | 2,103,000 |  |  |  |  |  |  |  |
Other | (894,000) | (1,107,000) |  |  |  |  |  |  |  |
Total accumulated other comprehensive income | $ 23,354,000 | $ 22,062,000 |  |  |  |  |  |  |  |

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