Other Non-Operating Income (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Non-Operating Income (Expense) [Line Items]
Foreign currency gain (loss), net	$ 1,728	$ (5,443)
(Loss) gain on sales of businesses	(342)	18,931
Gain on sales of marketable equity securities	0	1,754
Other, net	(537)	(146)
Total Other Non-Operating Income	$ 849	15,096
Kaplan Corporate and Other [Member] | Education [Member] | Colloquy [Member]
Schedule of Non-Operating Income (Expense) [Line Items]
(Loss) gain on sales of businesses		$ 18,900