Income Taxes Reconciliation of effective tax rate (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory Federal rate	35.00%	35.00%	35.00%
Increase (decrease) resulting from:
State and local taxes, net	(17.40%)	10.40%	2.80%
Change in valuation allowance	14.50%	(86.40%)	(26.90%)
Foreign tax rate differential	(14.30%)	17.90%	(2.20%)
Meals & entertainment	(9.00%)	11.60%	(2.60%)
Alternative minimum tax	(6.30%)	7.60%	0.00%
Provision to return differences	(4.50%)	24.40%	(3.20%)
Executive life insurance	(3.10%)	2.40%	2.30%
Captive insurance income	(3.00%)	0.00%	0.00%
Change in uncertain tax positions	0.60%	56.20%	(9.00%)
Other items, net	1.10%	(4.90%)	(0.10%)
Provision for income taxes	(6.40%)	74.20%	(3.90%)