Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Effective Income Tax Rate Reconciliation, Percent	39.80%	15.20%	33.10%	17.40%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				35.00%
Gain on previously held equity interest on ecoATM	$ 0	$ 68,376,000	$ 0	$ 68,376,000
ecoATM [Member]
Gain on previously held equity interest on ecoATM	0	68,376,000	0	68,376,000
Effective Income Tax Rate Reconciliation, Nontaxable Re-measurement Gain, Percent		23.40%		12.00%
NCR [Member]
Effective Income Tax Rate Reconciliation, Deduction, Other, Amount				$ 17,800,000
Effective Income Tax Rate Reconciliation, Deduction, Other, Percent				8.90%