Domestic And Foreign Income Taxes (Reconciliation Of Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Domestic And Foreign Income Taxes [Abstract]
Tax provision at statutory rate	34.00%	34.00%	(34.00%)
Change in valuation allowance	(13.80%)	(1.25%)	(5.12%)
Impact of permanent items, including stock based compensation expense	(30.97%)	16.40%	24.15%
Effect of foreign tax rates	11.36%	(18.04%)	6.35%
State taxes net of federal benefit	2.78%	(3.86%)	(1.43%)
Effect of dividend of foreign subsidiary in prior year	7.52%	3.94%	17.16%
Prior year provision to return true-up	(9.73%)	(10.27%)	(5.10%)
Non-controlling interest	1.77%
Other	(2.04%)	(6.40%)	8.45%
Domestic and foreign income tax rate	0.89%	14.52%	10.46%