Selected Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended							6 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Mar. 31, 2012	Jun. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Selected Quarterly Financial Information [Abstract]
Revenues	$ 106,412	$ 88,992	$ 84,081	$ 75,059	$ 98,634	$ 75,386	$ 50,890	$ 67,132	$ 354,544	$ 292,042	$ 259,852
Gross Profit	12,806	5,585	7,786	5,827	12,522	4,892	(2,827)	(217)	32,004	14,370	10,238
Operating (loss) income	3,916	(2,389)	231	(1,864)	5,703	(2,293)	(9,918)	(7,695)	(106)	(14,203)	(19,281)
(Loss) income before income taxes	3,416	(2,475)	190	(1,737)	3,787	(2,480)	(9,895)	(7,918)	(606)	(16,506)	(19,461)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	2,190	(974)	212	(1,097)
Net income (loss)	2,134	(943)	230	(1,090)	1,486	(1,595)	(6,336)	(5,421)	331	(11,866)	(13,114)
Net income/(loss) attributable to noncontrolling interest	$ 56	$ (31)	$ (18)	$ (7)					$ 0	$ 0	$ 0
Earnings Per Share, Basic and Diluted [Abstract]
Basic (in dollars per share)	$ 0.08	$ (0.03)	$ 0.01	$ (0.04)	$ 0.05	$ (0.06)	$ (0.23)	$ (0.20)	$ 0.01	$ (0.44)	$ (0.49)
Diluted (in dollars per share)	$ 0.08	$ (0.03)	$ 0.01	$ (0.04)	$ 0.05	$ (0.06)	$ (0.23)	$ (0.20)	$ 0.01	$ (0.44)	$ (0.49)