Related Party Transactions (Details 2) (Lansing Trade Group [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Lansing Trade Group [Member]
Related Party Transaction [Line Items]
Sales	$ 2,206,433	$ 1,680,170	$ 6,828,076	$ 4,874,347
Gross profit	64,095	50,412	143,608	126,330
Income before income taxes	27,321	20,108	54,122	49,014
Net income	25,496	18,545	52,490	47,486
Net income attributable to LTG	$ 25,211	$ 17,927	$ 51,823	$ 44,518