Basis of Presentation Basis of Presentation (Details 1) (USD $)	3 Months Ended			9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014 Restatement Adjustment	Sep. 30, 2013 Restatement Adjustment	Sep. 30, 2013 Restatement Adjustment
Indefinite-Lived Intangible Assets (Excluding Goodwill)							$ 5,600,000	$ 5,600,000
Other noncurrent assets	5,420,000	4,983,000	4,961,000	5,420,000	4,961,000		(5,600,000)	(5,600,000)
General and administrative	29,557,000		28,523,000	85,993,000	82,906,000		300,000	800,000
Revenue, Net	209,320,000		195,619,000	585,518,000	545,248,000		(300,000)	(800,000)
Gross Profit	95,553,000		89,895,000	269,233,000	243,787,000	2,300,000
Income (Loss) from Operations	32,218,000		30,885,000	83,956,000	69,575,000	2,000,000
Net income	$ 20,614,000	$ 7,668,000	$ 20,006,000	$ 53,151,000	$ 43,303,000	$ 1,300,000