LONG-TERM DEBT	12 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT Revolving Line of Credit — On September 12, 2014, the Company entered into a revolving loan agreement (the “2014 Credit Facility”) with PNC Bank, National Association; Santander Bank, N.A; and Silicon Valley Bank (collectively the “Lenders”). Under the 2014 Credit Facility, the Company’s borrowing capacity was set at $100,000, with potential to increase it to $200,000 if certain conditions were met. Borrowings under the 2014 Credit Facility were denominated in U.S. dollars or, up to a maximum of $50,000 in British pounds sterling, Canadian dollars, euros or Swiss francs (or other currencies as may be approved by the Lenders). Borrowings under the 2014 Credit Facility bore interest at either a base rate or Euro-rate plus a margin based on the Company’s leverage ratio. The base rate was equal to the highest of (a) the Federal Funds Open Rate, plus 0.5%, (b) the Prime Rate, and (c) the Daily LIBOR Rate, plus 1.0%. On May 24, 2017, the Company terminated the 2014 Credit Facility and entered into a new unsecured credit facility (the “2017 Credit Facility”) with PNC Bank, National Association; PNC Capital Markets LLC; Wells Fargo Bank, National Association; Santander Bank, N.A.; Fifth Third Bank and Citibank N.A. (collectively the “Lenders”). The 2017 Credit Facility provides for a borrowing capacity of $300,000, with potential to increase the credit facility up to $400,000 if certain conditions are met. The 2017 Credit Facility matures on May 24, 2022. Borrowings under the 2017 Credit Facility may be denominated in U.S. dollars or up to a maximum of $100,000 in British pounds sterling, Canadian dollars, euros or Swiss francs or other currencies as may be approved by the administrative agent and the lenders. Borrowings under the 2017 Credit Facility bear interest at either a base rate or Euro-rate plus a margin based on the Company’s leverage ratio. The base rate is equal to the highest of (a) the Overnight Bank Funding Rate, plus 0.5%, (b) the Prime Rate, or (c) the Daily LIBOR Rate, plus 1.0%. The 2017 Credit Facility includes customary business and financial covenants that may restrict the Company’s ability to make or pay dividends (other than certain intercompany dividends) if a potential or an actual event of default has occurred or would be triggered. As of December 31, 2017, the Company was in compliance with all covenants contained in the 2017 Credit Facility. As of December 31, 2017, the outstanding debt of the Company under the 2017 Credit Facility was $25,000 at an interest rate of 2.6%. As of December 31, 2016, the outstanding debt of the Company under the 2014 Credit Facility was $25,000. Both borrowings are subject to a LIBOR-based interest rate, which resets regularly at issuance, based on lending terms. As of December 31, 2017 and 2016, the Company had $1,294 and $942 irrevocable standby letters of credit, respectively. As of December 31, 2017, the borrowing capacity of the Company under the 2017 Credit Facility was $273,706. As of December 31, 2016, the borrowing capacity of the Company under the 2014 Credit Facility was $74,058.

LONG-TERM DEBT

Revolving Line of Credit — On September 12, 2014, the Company entered into a revolving loan agreement (the “2014 Credit Facility”) with PNC Bank, National Association; Santander Bank, N.A; and Silicon Valley Bank (collectively the “Lenders”). Under the 2014 Credit Facility, the Company’s borrowing capacity was set at $100,000, with potential to increase it to $200,000 if certain conditions were met.

Borrowings under the 2014 Credit Facility were denominated in U.S. dollars or, up to a maximum of $50,000 in British pounds sterling, Canadian dollars, euros or Swiss francs (or other currencies as may be approved by the Lenders). Borrowings under the 2014 Credit Facility bore interest at either a base rate or Euro-rate plus a margin based on the Company’s leverage ratio. The base rate was equal to the highest of (a) the Federal Funds Open Rate, plus 0.5%, (b) the Prime Rate, and (c) the Daily LIBOR Rate, plus 1.0%.

On May 24, 2017, the Company terminated the 2014 Credit Facility and entered into a new unsecured credit facility (the “2017 Credit Facility”) with PNC Bank, National Association; PNC Capital Markets LLC; Wells Fargo Bank, National Association; Santander Bank, N.A.; Fifth Third Bank and Citibank N.A. (collectively the “Lenders”). The 2017 Credit Facility provides for a borrowing capacity of $300,000, with potential to increase the credit facility up to $400,000 if certain conditions are met. The 2017 Credit Facility matures on May 24, 2022.

Borrowings under the 2017 Credit Facility may be denominated in U.S. dollars or up to a maximum of $100,000 in British pounds sterling, Canadian dollars, euros or Swiss francs or other currencies as may be approved by the administrative agent and the lenders. Borrowings under the 2017 Credit Facility bear interest at either a base rate or Euro-rate plus a margin based on the Company’s leverage ratio. The base rate is equal to the highest of (a) the Overnight Bank Funding Rate, plus 0.5%, (b) the Prime Rate, or (c) the Daily LIBOR Rate, plus 1.0%.

The 2017 Credit Facility includes customary business and financial covenants that may restrict the Company’s ability to make or pay dividends (other than certain intercompany dividends) if a potential or an actual event of default has occurred or would be triggered. As of December 31, 2017, the Company was in compliance with all covenants contained in the 2017 Credit Facility.

As of December 31, 2017, the outstanding debt of the Company under the 2017 Credit Facility was $25,000 at an interest rate of 2.6%. As of December 31, 2016, the outstanding debt of the Company under the 2014 Credit Facility was $25,000. Both borrowings are subject to a LIBOR-based interest rate, which resets regularly at issuance, based on lending terms.

As of December 31, 2017 and 2016, the Company had $1,294 and $942 irrevocable standby letters of credit, respectively.

As of December 31, 2017, the borrowing capacity of the Company under the 2017 Credit Facility was $273,706. As of December 31, 2016, the borrowing capacity of the Company under the 2014 Credit Facility was $74,058.