Purchased Receivables - Summary of Components of Net Purchased Receivables (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Purchased Receivables [Abstract]
Purchased receivables	$ 14,811		$ 16,298
Reserve for purchased receivable losses	(483)	(242)	(273)	(292)	(292)	(323)
Total	$ 14,328		$ 16,025