Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2015	Jun. 30, 2016
Goodwill [Line Items]
Goodwill, beginning balance		$ 1,377,255
Accumulated impairment losses, beginning balance		(359,742)
Goodwill, net, beginning balance		1,017,513
Acquisitions		161,399
Dispositions		(2,800)
Foreign currency exchange rate changes		(22,137)
Goodwill, ending balance		1,510,907
Accumulated impairment losses, ending balance		(356,932)
Goodwill, net, ending balance		1,153,975
Education [Member]
Goodwill [Line Items]
Goodwill, beginning balance		1,006,096
Accumulated impairment losses, beginning balance		(350,850)
Goodwill, net, beginning balance		655,246
Acquisitions		160,894
Dispositions		0
Foreign currency exchange rate changes		(22,137)
Goodwill, ending balance		1,144,853
Accumulated impairment losses, ending balance		(350,850)
Goodwill, net, ending balance		794,003
Education [Member] | Higher Education [Member]
Goodwill [Line Items]
Goodwill, beginning balance		392,457
Accumulated impairment losses, beginning balance		(248,591)
Goodwill, net, beginning balance		143,866
Acquisitions		0
Impairment	$ 248,600
Foreign currency exchange rate changes		116
Goodwill, ending balance		392,573
Accumulated impairment losses, ending balance		(248,591)
Goodwill, net, ending balance		143,982
Education [Member] | Test Preparation [Member]
Goodwill [Line Items]
Goodwill, beginning balance		166,098
Accumulated impairment losses, beginning balance		(102,259)
Goodwill, net, beginning balance		63,839
Acquisitions		0
Foreign currency exchange rate changes		0
Goodwill, ending balance		166,098
Accumulated impairment losses, ending balance		(102,259)
Goodwill, net, ending balance		63,839
Education [Member] | Kaplan International [Member]
Goodwill [Line Items]
Goodwill, beginning balance		447,541
Accumulated impairment losses, beginning balance		0
Goodwill, net, beginning balance		447,541
Acquisitions		160,894
Foreign currency exchange rate changes		(22,253)
Goodwill, ending balance		586,182
Accumulated impairment losses, ending balance		0
Goodwill, net, ending balance		586,182
Television Broadcasting [Member]
Goodwill [Line Items]
Goodwill, beginning balance		168,345
Accumulated impairment losses, beginning balance		0
Goodwill, net, beginning balance		168,345
Acquisitions		0
Dispositions		0
Foreign currency exchange rate changes		0
Goodwill, ending balance		168,345
Accumulated impairment losses, ending balance		0
Goodwill, net, ending balance		168,345
Other Businesses [Member]
Goodwill [Line Items]
Goodwill, beginning balance		202,814
Accumulated impairment losses, beginning balance		(8,892)
Goodwill, net, beginning balance		193,922
Acquisitions		505
Dispositions		(2,800)
Foreign currency exchange rate changes		0
Goodwill, ending balance		197,709
Accumulated impairment losses, ending balance		(6,082)
Goodwill, net, ending balance		$ 191,627