Income Taxes (Details 2)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Effective tax rate reconciliation
Statutory U.S. federal tax rate	35.00%	35.00%	35.00%
Increase (decrease) in rate resulting from:
Effect of noncontrolling interest	(4.70%)	5.30%	(2.50%)
State and local income taxes, net of related federal taxes	5.80%	1.40%	2.70%
Income taxes on foreign earnings	(1.30%)	9.40%	(0.40%)
Change in pre-acquisition tax liability and other costs	0.00%	3.50%	0.00%
Tax associated with accrued and unpaid dividends	3.20%	(13.60%)	0.00%
Goodwill impairment	0.00%	(35.60%)	0.00%
Nondeductible compensation	2.00%	(5.00%)	0.20%
Federal income tax credits	(7.30%)	(0.00%)	(0.00%)
Other, net	(0.40%)	1.70%	(1.60%)
Effective tax rate	32.30%	2.10%	33.40%