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Summary of Significant Accounting Policies (Additional Information) (Details) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 24 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2014 USD ($) item $ / shares | Jan. 31, 2014 ARS / $ | Jun. 30, 2015 USD ($) $ / shares VEF / $ | Mar. 31, 2015 USD ($) | Jun. 30, 2014 USD ($) item $ / shares | Mar. 31, 2014 USD ($) | Jun. 30, 2015 USD ($) $ / shares VEF / $ | Jun. 30, 2014 USD ($) item $ / shares | Dec. 31, 2014 USD ($) item | Feb. 10, 2015 VEF / $ | Dec. 31, 2013 ARS / $
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of revenues and operating costs generated in foreign operations |  |  |  |  |  |  | 99.90% | 99.60% |  |  |
Long-lived assets and goodwill located in the foreign operations |  |  | $ 207,000 |  |  |  | $ 207,000 |  | $ 170,147,000 |  |
Exchange rate used to re-measure transactions |  | 8.0 | 197.30 |  |  |  | 197.30 |  |  | 12 | 6.52
Foreign exchange loss |  |  |  | $ 20,400,000 | $ 16,500,000 |  |  |  |  |  |
Impairment of Long lived assets |  |  |  |  | 49,496,000 |  | $ 16,226,000 | $ 49,496,000 |  |  |
Percentage of increase in exchange ratio |  | 23.00% |  |  |  |  |  |  |  |  |
Net assets decreased |  |  |  |  |  | $ 14,625,000 |  |  |  |  |
Recognize foreign currency gain |  |  |  |  |  | $ 4,597,000 |  |  |  |  |
Percentage on relief of total income tax |  |  |  |  |  |  | 60.00% |  |  |  |
Aggregate tax benefit, total |  |  |  |  | $ 1,497,000 |  |  | $ 3,599,000 |  |  |
Aggregate per share effect of the Argentine tax holiday | $ / shares |  |  |  |  | $ 0.03 |  |  | $ 0.08 |  |  |
Number of acquisitions | item |  |  |  |  |  |  |  |  | 2 |  |
Minimum percentage of principal amount outstanding |  |  |  |  |  |  | 25.00% |  |  |  |
Percent of principal holder of 25% of note can declare, including interest due and payable |  |  |  |  |  |  | 100.00% |  |  |  |
Payment for capped call transactions |  |  |  |  |  |  |  | $ 19,668,000 |  |  |
Net of deferred income tax effect amounts |  |  |  |  |  |  | $ 7,736,000 | $ (8,672,000) |  |  |
SICAD 2 [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of Long lived assets |  |  |  |  | $ 49,500,000 |  |  |  |  |  |
Venezuelan Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of office spaces owned | item | 2 |  |  |  | 2 |  |  | 2 |  |  |
Fair value of real estate properties |  |  |  | 9,200,000 |  |  |  |  |  |  |
Impairment of Long lived assets |  |  | $ 49,500,000 | $ 16,200,000 |  |  |  |  |  |  |
Percentage of consolidated net assets |  |  | 0.80% |  |  |  | 0.80% |  |  |  |
Percentage of consolidated cash and investments |  |  | 1.10% |  |  |  | 1.10% |  |  |  |
2.25% Convertible Senior Notes Due 2019 [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Convertible senior notes, issued | $ 330,000,000 |  | $ 330,000,000 |  | $ 330,000,000 |  | $ 330,000,000 | $ 330,000,000 | $ 330,000,000 |  |
Convertible senior notes, interest rate | 2.25% |  |  |  | 2.25% |  |  | 2.25% |  |  |
Convertible senior notes, maturity date | Jul. 01, 2019 |  |  |  |  |  |  |  |  |  |
Convertible senior notes, conversion rate | 7.9353% |  |  |  |  |  |  |  |  |  |
Convertible senior notes, conversion price | $ / shares | $ 126.02 |  |  |  | $ 126.02 |  |  | $ 126.02 |  |  |
Convertible senior notes, principal amount per share | $ 1,000 |  |  |  |  |  |  |  |  |  |
Carrying value of the permanent equity component reported in additional paid-in-capital |  |  |  |  |  |  | 46,985,000 |  |  |  |
Net carrying amount |  |  | $ 283,015,000 |  |  |  | $ 283,015,000 |  |  |  |
Cash flows, discount rate |  |  |  |  |  |  | 5.55% |  |  |  |
Effective interest rate |  |  | 6.10% |  |  |  | 6.10% |  |  |  |
2.25% Convertible Senior Notes Due 2019 [Member] | Capped Call Transactions [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payment for capped call transactions |  |  |  |  |  |  |  | $ 19,668,000 |  |  |
Strike price, per share | $ / shares |  |  |  |  |  |  | $ 126.02 |  |  |  |
Approximate cap price, per share | $ / shares |  |  | $ 155.78 |  |  |  | $ 155.78 |  |  |  |
Net of deferred income tax effect amounts |  |  |  |  |  |  | $ 12,784,000 |  |  |  |

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