INDEBTEDNESS (Narrative) (Details) (USD $)	12 Months Ended		12 Months Ended												0 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Base Rate Loans	Dec. 31, 2013 London Interbank Offered Rate Loans	Dec. 31, 2013 Revolving Credit Facility	Dec. 31, 2011 Revolving Credit Facility	Dec. 31, 2013 Line Of Credit Term A Loan	Dec. 31, 2011 Line Of Credit Term A Loan	Dec. 31, 2013 Credit Facility Accordion Feature	Dec. 31, 2011 Credit Facility Accordion Feature	Dec. 31, 2013 Letter of Credit	Aug. 27, 2013 Revolving Credit Facility	Aug. 26, 2013 Revolving Credit Facility	Dec. 31, 2013 Revolving Credit Facility Line of Credit Facility Including Accordion Feature	Aug. 27, 2013 Revolving Credit Facility	Dec. 31, 2013 Revolving Credit Facility	Dec. 31, 2013 Revolving Credit Facility Base Rate Loans	Dec. 31, 2013 Revolving Credit Facility Federal Funds Rate	Dec. 31, 2013 Revolving Credit Facility Prime Rate	Dec. 31, 2013 Revolving Credit Facility One-month LIBOR	Dec. 31, 2013 Revolving Credit Facility London Interbank Offered Rate Loans
Line of Credit Facility [Line Items]
Maximum borrowing capacity					$ 350,000,000	$ 250,000,000	$ 50,000,000	$ 50,000,000	$ 75,000,000	$ 75,000,000		$ 400,000,000	$ 300,000,000	$ 475,000,000		$ 350,000,000
Debt Issuance Cost															1,300,000
Percentage of issued and outstanding stock pledged of foreign subsidiaries as collateral for credit facility	65.00%
Description of variable rate basis																	base rate	federal funds rate	prime rate	one-month LIBOR	LIBOR
Applicable percentage			1.25%	2.25%														0.50%		1.50%
Interest rate at end of period (as a percent)				2.45%
Unused capacity, commitment fee percentage	0.35%
Borrowings on credit facility	$ 270,139,000	$ 178,062,000									$ 5,300,000