Held for Sale and Discontinued Operations - Schedule of Financial Position for DMG's Discontinued Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets
Total current assets held for sale	$ 5,761,642	$ 960,956
Total long-term assets held for sale	0	5,252,135
Liabilities
Total current liabilities held for sale	1,185,070	807,233
Total long-term liabilities held for sale	0	428,885
DMG | Discontinued Operations, Held-for-sale
Assets
Cash and cash equivalents	179,668	238,411
Other current assets	888,697	722,545
Property and equipment, net	379,945	311,246
Intangible assets, net	1,316,550	1,454,263
Other long-term assets	116,805	94,684
Goodwill	2,879,977	3,391,942
Total assets held for sale	5,761,642	6,213,091
Total current assets held for sale	5,761,642	960,956
Total long-term assets held for sale	0	5,252,135
Liabilities
Other liabilities	505,734	460,458
Medical payables	457,040	349,506
Current portion of long-term debt	2,845	4,779
Long-term debt	35,003	2,652
Other long-term liabilities	184,448	418,723
Total liabilities held for sale	1,185,070	1,236,118
Total current liabilities held for sale	1,185,070	807,233
Total long-term liabilities held for sale	$ 0	$ 428,885