Summary of Significant Accounting Policies - Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Oct. 31, 2013 Rate	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2010
Goodwill [Line Items]
Goodwill	$ 33,798			$ 33,798	$ 31,149
Goodwill acquired during period			$ 2,649
Revenue growth rate implied in reporting units valuations, number of years projected	5 years
Fair Value Inputs, Discount Rate		0.00%
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		71.00%
Gulf Coast
Goodwill [Line Items]
Goodwill impairment test, change in discount rate applied	3.25%
East Coast
Goodwill [Line Items]
Goodwill impairment test, change in discount rate applied	1.50%