Investments (Tables)

12 Months Ended

Dec. 31, 2016

Investments [Abstract]

Summary of Investments

Investments primarily comprise strategic investments and deferred compensation investments. Investments consist of the following (in thousands):

	December 31, 2016		December 31, 2015
Strategic investments:
Investments accounted for under the equity method	$	16,707	$	86,853
Investments held at fair value	9,198		1,814
Investments held at cost, less impairment	2,789		8,746
Total strategic investments	28,694		97,413
Other investments	2,285		1,530
Total investments	$	30,979	$	98,943