Debt	6 Months Ended
Jun. 30, 2016
Debt Disclosure [Abstract]
Debt	NOTE 10. DEBT (a) Revolving Credit Facility In October 2015, the Company entered into an amendment and restatement of its original credit agreement (the “Credit Agreement”) with JPMorgan Chase Bank, N.A., as administrative agent, and the lenders from time to time party thereto (the “Lenders”), providing for: (i) a five-year $300 million revolving loan facility (the “Revolving Credit Facility”); and (ii) an uncommitted accordion facility subject to the satisfaction of certain conditions (collectively, the “Senior Secured Credit Facility”). The Revolving Credit Facility includes a $50 million multicurrency sub-facility, a $20 million letter of credit sub-facility and a $10 million swing line loan sub-facility. Loans under the Revolving Credit Facility bear interest, at the Company’s option, at a rate equal to either (a) the LIBOR rate, plus an applicable margin ranging from 1.75% to 2.50% per annum, based upon the secured leverage ratio (as defined in the Credit Agreement) or (b) the prime lending rate, plus an applicable margin ranging from 0.75% to 1.50% per annum, based upon the senior secured net leverage ratio (as defined in the Credit Agreement). In October 2015, the Company borrowed $75.0 million under the Revolving Credit Facility, which the Company repaid in January 2016. The interest rate for this borrowing was 2.1250% and was applied on an actual/360 day basis. There were no balances outstanding under the Revolving Credit Facility at June 30, 2016. The obligations under the Credit Agreement and any swap obligations and banking services obligations owing to a lender (or an affiliate of a lender) thereunder are and will be guaranteed by the Company and each of the Company’s existing and subsequently acquired or organized direct and indirect domestic subsidiaries (other than certain immaterial domestic subsidiaries, certain Domestic Foreign Holding Companies, and certain domestic subsidiaries whose equity interests are owned directly or indirectly by certain foreign subsidiaries) (collectively, the “Loan Parties”). The obligations under the Credit Agreement and any such swap and banking services obligations are secured, subject to customary permitted liens and other agreed upon exceptions, by a perfected security interest in (i) all tangible and intangible assets of the Loan Parties, except for certain customary excluded assets, and (ii) all of the capital stock owned by the Loan Parties thereunder (limited, in the case of the stock of certain non-U.S. subsidiaries of the Company and Domestic Foreign Holding Companies, to 65% of the capital stock of such subsidiaries). The Credit Agreement contains customary representations and warranties and customary affirmative and negative covenants, including, among other things, restrictions on indebtedness, liens, investments, mergers, dispositions, prepayment of other indebtedness and dividends and other distributions. Under the terms of the Credit Agreement, the Company is required to comply with a maximum senior secured net leverage ratio and minimum interest coverage ratio covenants. At June 30, 2016, the Company was in compliance with these covenants. In accordance with ASU 2015-15, the Company deferred $1.7 million of debt issuance costs associated with the Revolving Credit Facility, including underwriting, legal and accounting fees, and is amortizing this amount ratably over the five-year access period of the facility. Amortization of the debt issuance costs is recorded as non-cash interest expense on the unaudited condensed consolidated statements of operations. (b) Convertible Notes Due 2017 In March 2012, the Company issued $258.8 million aggregate principal amount of 2.625% convertible senior notes due April 1, 2017, or the Convertible Notes. The Company was required to pay interest semi-annually in arrears on April 1 and October 1 of each year. The Convertible Notes were convertible upon the occurrence of certain conditions into shares of the Company’s common stock. During 2015, the Company settled all of the Convertible Notes. During the second quarter of 2015, the Company settled a total of $91.0 million aggregate principal amount of the Convertible Notes through a combination of $92.1 million in cash and 2,099,358 shares of its common stock. During the third quarter of 2015, the Company settled a total of $167.8 million aggregate principal amount of the Convertible Notes through a combination of $167.8 million in cash and 3,539,218 shares of its common stock. The Company recorded a non-cash loss on extinguishment of the Convertible Notes of $7.9 million and $13.2 million in the second and third quarters of 2015, respectively, which was included in other income (expense), net, on the condensed consolidated statements of operations. Forfeited accrued interest payable totaling $1.7 million was reclassified to additional paid-in capital during 2015. Upon settlement, the Convertible Notes were no longer outstanding, interest ceased to accrue thereon, and all rights of the holders of the Convertible Notes ceased to exist.

NOTE 10. DEBT

(a) Revolving Credit Facility

In October 2015, the Company entered into an amendment and restatement of its original credit agreement (the “Credit Agreement”) with JPMorgan Chase Bank, N.A., as administrative agent, and the lenders from time to time party thereto (the “Lenders”), providing for: (i) a five-year $300 million revolving loan facility (the “Revolving Credit Facility”); and (ii) an uncommitted accordion facility subject to the satisfaction of certain conditions (collectively, the “Senior Secured Credit Facility”). The Revolving Credit Facility includes a $50 million multicurrency sub-facility, a $20 million letter of credit sub-facility and a $10 million swing line loan sub-facility.

Loans under the Revolving Credit Facility bear interest, at the Company’s option, at a rate equal to either (a) the LIBOR rate, plus an applicable margin ranging from 1.75% to 2.50% per annum, based upon the secured leverage ratio (as defined in the Credit Agreement) or (b) the prime lending rate, plus an applicable margin ranging from 0.75% to 1.50% per annum, based upon the senior secured net leverage ratio (as defined in the Credit Agreement). In October 2015, the Company borrowed $75.0 million under the Revolving Credit Facility, which the Company repaid in January 2016. The interest rate for this borrowing was 2.1250% and was applied on an actual/360 day basis. There were no balances outstanding under the Revolving Credit Facility at June 30, 2016.

The obligations under the Credit Agreement and any swap obligations and banking services obligations owing to a lender (or an affiliate of a lender) thereunder are and will be guaranteed by the Company and each of the Company’s existing and subsequently acquired or organized direct and indirect domestic subsidiaries (other than certain immaterial domestic subsidiaries, certain Domestic Foreign Holding Companies, and certain domestic subsidiaries whose equity interests are owned directly or indirectly by certain foreign subsidiaries) (collectively, the “Loan Parties”). The obligations under the Credit Agreement and any such swap and banking services obligations are secured, subject to customary permitted liens and other agreed upon exceptions, by a perfected security interest in (i) all tangible and intangible assets of the Loan Parties, except for certain customary excluded assets, and (ii) all of the capital stock owned by the Loan Parties thereunder (limited, in the case of the stock of certain non-U.S. subsidiaries of the Company and Domestic Foreign Holding Companies, to 65% of the capital stock of such subsidiaries).

The Credit Agreement contains customary representations and warranties and customary affirmative and negative covenants, including, among other things, restrictions on indebtedness, liens, investments, mergers, dispositions, prepayment of other indebtedness and dividends and other distributions. Under the terms of the Credit Agreement, the Company is required to comply with a maximum senior secured net leverage ratio and minimum interest coverage ratio covenants. At June 30, 2016, the Company was in compliance with these covenants.

In accordance with ASU 2015-15, the Company deferred $1.7 million of debt issuance costs associated with the Revolving Credit Facility, including underwriting, legal and accounting fees, and is amortizing this amount ratably over the five-year access period of the facility. Amortization of the debt issuance costs is recorded as non-cash interest expense on the unaudited condensed consolidated statements of operations.

(b) Convertible Notes Due 2017

In March 2012, the Company issued $258.8 million aggregate principal amount of 2.625% convertible senior notes due April 1, 2017, or the Convertible Notes. The Company was required to pay interest semi-annually in arrears on April 1 and October 1 of each year. The Convertible Notes were convertible upon the occurrence of certain conditions into shares of the Company’s common stock.

During 2015, the Company settled all of the Convertible Notes. During the second quarter of 2015, the Company settled a total of $91.0 million aggregate principal amount of the Convertible Notes through a combination of $92.1 million in cash and 2,099,358 shares of its common stock. During the third quarter of 2015, the Company settled a total of $167.8 million aggregate principal amount of the Convertible Notes through a combination of $167.8 million in cash and 3,539,218 shares of its common stock. The Company recorded a non-cash loss on extinguishment of the Convertible Notes of $7.9 million and $13.2 million in the second and third quarters of 2015, respectively, which was included in other income (expense), net, on the condensed consolidated statements of operations. Forfeited accrued interest payable totaling $1.7 million was reclassified to additional paid-in capital during 2015. Upon settlement, the Convertible Notes were no longer outstanding, interest ceased to accrue thereon, and all rights of the holders of the Convertible Notes ceased to exist.