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Shareholder's Equity - Additional Information (Detail) | 12 Months Ended |  |  |  | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | Dec. 31, 2012 CHF | Dec. 31, 2011 CHF | Dec. 31, 2012 Fourth Quarter Twenty Twelve USD ($) | Dec. 31, 2012 First Quarter Twenty Thirteen USD ($) | Dec. 31, 2012 Second Quarter Twenty Thirteen USD ($) | Dec. 31, 2012 Stock Repurchase Program USD ($) | Oct. 01, 2012 Stock Repurchase Program USD ($) | Dec. 31, 2012 Exercise of Warrants and Conversion of Notes | Dec. 31, 2012 Stockholder Rights Plan | Jun. 30, 2014 Scenario, Forecast USD ($) | Mar. 31, 2014 Scenario, Forecast USD ($) | Dec. 31, 2013 Scenario, Forecast USD ($) | Sep. 30, 2013 Scenario, Forecast USD ($) | Feb. 26, 2013 Scenario, Forecast USD ($)
Stockholders Equity Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, share Authorized | 213,000,000 |  |  |  | 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share |  |  |  | 0.50 | 0.50 |  |  |  |  |  |  |  |  |  |  |  |
Maximum Annual Authorized Share Increase | 106,500,000 |  |  |  |  |  |  |  |  |  | 81,500,000 | 25,000,000 |  |  |  |  |
Authorized amount to repurchase shares of common stock |  | $ 25,000,000 | $ 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock shares repurchased, shares |  | 389,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock amount repurchased | 0 | 12,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorization expiry date | Sep. 28, 2012 |  |  |  |  |  |  |  |  | Dec. 31, 2015 |  |  |  |  |  |  |
Repurchase of shares of our common stock up to a maximum aggregate value |  |  |  |  |  |  |  |  | 400,000,000 | 800,000,000 |  |  |  |  |  |  |
Repurchase of Common Stock, Shares |  |  |  |  |  |  |  |  | 7,291,078 |  |  |  |  |  |  |  |
Repurchase of Common Stock, Value |  |  |  |  |  |  |  |  | 334,200,000 |  |  |  |  |  |  |  |
Dividends Payable Amount Per Share | $ 0.68 |  |  |  |  | $ 0.22 | $ 0.23 | $ 0.23 |  |  |  |  | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 1.00
Dividend Payable | $ 94,967,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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