Segment Information Revenue by Major Customers, by Reporting Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue, Major Customer [Line Items]
Net revenues	$ 33,496	$ 31,420	$ 28,761	$ 26,351	$ 26,915	$ 34,293	$ 24,450	$ 14,446	$ 120,028	$ 100,104	$ 2,502
Sales
Revenue, Major Customer [Line Items]
Number of customers									2	2	0
Sales | Customer A
Revenue, Major Customer [Line Items]
Net revenues									20,400	11,200
Concentration risk (as a percent)									17.00%	11.10%
Sales | Customer B
Revenue, Major Customer [Line Items]
Net revenues									$ 12,700	$ 11,000
Concentration risk (as a percent)									10.50%	11.00%