Investments Fair Value Option Investment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Gain (Loss) on Investments [Line Items]
Assets, Current	$ 1,039,159		$ 1,039,159		$ 1,075,242
Revenue	756,030	$ 738,395	1,488,001	$ 1,488,751
Fair Value, Option, Changes in Fair Value, Gain (Loss)	(4,607)	450	(5,707)	450
Gross Profit	333,588	337,007	672,916	684,413
Other Assets, Noncurrent	23,433		23,433		16,620
Liabilities, Current	1,077,122		1,077,122		1,203,525
Liabilities, Noncurrent	124,051		124,051		$ 113,540
Monster LP [Member]
Gain (Loss) on Investments [Line Items]
Assets, Current		146,960		146,960
Revenue		14,110
Gross Profit		4,338
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		(8,339)
Equity Method Investment, Summarized Financial Information, Net Income (Loss)		(8,339)
Other Assets, Noncurrent		512,766		512,766
Liabilities, Current		186,792		186,792
Liabilities, Noncurrent		7,277		$ 7,277
GroupMax [Member]
Gain (Loss) on Investments [Line Items]
Equity method investments	16,400		16,400
Monster LP [Member]
Gain (Loss) on Investments [Line Items]
Equity method investments	122,100		122,100
Fair Value, Option, Changes in Fair Value, Gain (Loss)	1,300	$ 450	$ 1,400
Fair Value Inputs, Discount Rate			21.00%
GroupMax [Member]
Gain (Loss) on Investments [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ (3,300)		$ (4,300)
Fair Value Inputs, Discount Rate			20.00%