INDEBTEDNESS (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Borrowings on credit facility	$ 353,205,000	$ 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	353,200,000
Revolving Credit Facility | Base Rate
Line of Credit Facility [Line Items]
Description of variable rate basis	base rate
Applicable percentage	1.25%
Revolving Credit Facility | Federal Funds Purchased
Line of Credit Facility [Line Items]
Description of variable rate basis	federal funds rate
Applicable percentage	0.50%
Revolving Credit Facility | Prime Rate
Line of Credit Facility [Line Items]
Description of variable rate basis	prime rate
Revolving Credit Facility | One-month LIBOR
Line of Credit Facility [Line Items]
Description of variable rate basis	one-month LIBOR
Applicable percentage	1.50%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
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)	2.71%
Revolving Credit Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	350,000,000
Revolving Credit Facility | Line Of Credit Term A Loan
Line of Credit Facility [Line Items]
Maximum borrowing capacity	150,000,000
Revolving Credit Facility | Credit Facility Accordian Feature
Line of Credit Facility [Line Items]
Maximum borrowing capacity	75,000,000.0
Revolving Credit Facility | Line of Credit Facility Including Accordion Feature
Line of Credit Facility [Line Items]
Maximum borrowing capacity	575,000,000
Revolving Credit Facility | Letter of Credit
Line of Credit Facility [Line Items]
Borrowings on credit facility	$ 3,200,000