Deferred Revenue (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Deferred Revenue [Roll Forward]
Balance at December 31, 2014	$ 1,988
Cash Additions	23,685
Revenue Recognition	(18,185)
Balance at September 30, 2015	7,488
Other – net
Deferred Revenue [Roll Forward]
Balance at December 31, 2014	1,988
Cash Additions	9,285
Revenue Recognition	(7,385)
Balance at September 30, 2015	3,888
Liquidity Provider Slidingn Scale [Member]
Deferred Revenue [Roll Forward]
Cash Additions	14,400
Revenue Recognition	(10,800)
Balance at September 30, 2015	$ 3,600