FAIR VALUE MEASUREMENTS (Contingent Consideration Roll Forward) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Acquisition date fair value of contractual contingent liabilities	$ 1,924	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 1,924	$ 0	$ 0
Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contractual contingent liabilities at January 1, 2014				0					0
Liability-classified stock-based awards									3,088
Changes in fair value of contractual contingent liabilities included in earnings									2,059
Changes in fair value of contractual contingent liabilities recorded against goodwill									1,366
Effect of net foreign currency exchange rate changes									(288)
Contractual contingent liabilities at September 30, 2014	40,623								40,623
Level 3 | Netsoft
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Acquisition date fair value of contractual contingent liabilities									1,825
Level 3 | Jointech
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Acquisition date fair value of contractual contingent liabilities									20,000
Level 3 | GGA
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Acquisition date fair value of contractual contingent liabilities									11,400
Level 3 | Great Fridays
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Acquisition date fair value of contractual contingent liabilities									$ 1,173