Goodwill and Other Intangible Assets (Amortization Expenses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 3,671	$ 3,191	$ 11,366	$ 7,085
Retailer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	1,358	1,568	4,429	4,713
Developed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	1,700	1,133	5,100	1,133
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 613	$ 490	$ 1,837	$ 1,239