ACQUIRED INTANGIBLE ASSETS, NET (Acquired Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Schedule of Acquired Finite-Lived and Indefinite-lived Intangible Assets by Major Class [Line Items]
Acquired Intangible Assets, Total Cost		$ 141,744
Acquired Intangible Assets, Net	154,669	154,669
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Period Increase (Decrease)		12,925
Accumulated Amortization, Finite-lived	(93,970)	(90,594)
Foreign Currency Translation Adjustment, Finite-lived	(1,654)	(1,320)
Indefinite-Lived Intangible Assets [Abstract]
Acquired intangible assets, Indefinite-lived	59,045	62,755
Finite-lived and Indefinite-lived Intangible Assets Acquired	59,045	62,755
Trademarks and Brand Names - Dice [Member]
Indefinite-Lived Intangible Assets [Abstract]
Acquired intangible assets, Indefinite-lived	39,000	39,000
Technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total Cost, Finite-lived		17,500
Finite-Lived Intangible Assets, Period Increase (Decrease)		3,500
Accumulated Amortization, Finite-lived	(16,267)	(15,156)
Foreign Currency Translation Adjustment, Finite-lived	(161)	(53)
Acquired Intangible Assets, Finite-lived	21,000	21,000
Weighted Average Amortization Period	3 years 8 months 12 days	3 years 8 months 12 days
Finite-lived Intangible Assets Acquired	4,572	5,791
Trademarks and Brand Names- Other [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total Cost, Finite-lived		15,490
Finite-Lived Intangible Assets, Period Increase (Decrease)		3,625
Accumulated Amortization, Finite-lived	(9,646)	(8,930)
Foreign Currency Translation Adjustment, Finite-lived	(602)	(490)
Acquired Intangible Assets, Finite-lived	19,115	19,115
Weighted Average Amortization Period	6 years	6 years
Finite-lived Intangible Assets Acquired	8,867	9,695
Customer Lists [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total Cost, Finite-lived		41,513
Finite-Lived Intangible Assets, Period Increase (Decrease)		3,700
Accumulated Amortization, Finite-lived	(39,345)	(38,624)
Foreign Currency Translation Adjustment, Finite-lived	(814)	(729)
Acquired Intangible Assets, Finite-lived	45,213	45,213
Weighted Average Amortization Period	4 years 9 months 18 days	4 years 9 months 18 days
Finite-lived Intangible Assets Acquired	5,054	5,860
Candidate Database [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total Cost, Finite-lived		28,241
Finite-Lived Intangible Assets, Period Increase (Decrease)		2,100
Accumulated Amortization, Finite-lived	(28,712)	(27,884)
Foreign Currency Translation Adjustment, Finite-lived	(77)	(48)
Acquired Intangible Assets, Finite-lived	30,341	30,341
Weighted Average Amortization Period	2 years 9 months 18 days	2 years 9 months 18 days
Finite-lived Intangible Assets Acquired	$ 1,552	$ 2,409
FINS.com, Slashdot Media and WorkDigital [Member] | Technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Weighted Average Amortization Period	2 years 9 months 18 days
FINS.com, Slashdot Media and WorkDigital [Member] | Trademarks and Brand Names- Other [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Weighted Average Amortization Period	5 years 9 months 18 days
FINS.com, Slashdot Media and WorkDigital [Member] | Customer Lists [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Weighted Average Amortization Period	10 years 0 months 6 days
FINS.com, Slashdot Media and WorkDigital [Member] | Candidate Database [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Weighted Average Amortization Period	1 year 7 months 6 days