INDEBTEDNESS (Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Borrowings on credit facility	$ 334,282,000	$ 330,895,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Percentage of issued and outstanding stock pledged of foreign subsidiaries as collateral for credit facility	65.00%
Unused capacity, commitment fee percentage	0.40%
Borrowings on credit facility	$ 334,300,000
Base Rate | Revolving Credit Facility
Line of Credit Facility [Line Items]
Description of variable rate basis	base rate
Applicable percentage	1.50%
Federal Funds Purchased | Revolving Credit Facility
Line of Credit Facility [Line Items]
Description of variable rate basis	federal funds rate
Applicable percentage	0.50%
Prime Rate | Revolving Credit Facility
Line of Credit Facility [Line Items]
Description of variable rate basis	prime rate
One-month LIBOR | Revolving Credit Facility
Line of Credit Facility [Line Items]
Description of variable rate basis	one-month LIBOR
Applicable percentage	1.50%
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility
Line of Credit Facility [Line Items]
Description of variable rate basis	LIBOR
Applicable percentage	2.50%
Interest rate at end of period (as a percent)	2.74%
Revolving Credit Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 350,000,000
Line Of Credit Term A Loan | Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	150,000,000
Credit Facility Accordian Feature | Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	75,000,000
Line of Credit Facility Including Accordion Feature | Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	575,000,000
Letter of Credit | Revolving Credit Facility
Line of Credit Facility [Line Items]
Borrowings on credit facility	$ 3,200,000