Goodwill and Other Intangible Assets (Expected Future Amortization) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Remainder of 2015	$ 6,588
2016	13,093
2017	13,093
2018	9,643
2019	4,813
2020	4,419
Thereafter	6,380
Intangible assets, net	58,029	$ 64,691
Retailer relationships
Finite-Lived Intangible Assets [Line Items]
Remainder of 2015	2,006
2016	4,012
2017	4,012
2018	4,012
2019	4,012
2020	4,012
Thereafter	6,023
Intangible assets, net	28,089	30,095
Developed technology
Finite-Lived Intangible Assets [Line Items]
Remainder of 2015	3,400
2016	6,800
2017	6,800
2018	3,967
2019	0
2020	0
Thereafter	0
Intangible assets, net	20,967	24,367
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Remainder of 2015	1,182
2016	2,281
2017	2,281
2018	1,664
2019	801
2020	407
Thereafter	357
Intangible assets, net	$ 8,973	$ 10,229