Quarterly Results of Operations (unaudited) (Table) (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2013 First Quarter [Member]	Mar. 31, 2012 First Quarter [Member]	Jun. 30, 2013 Second Quarter [Member]	Jun. 30, 2012 Second Quarter [Member]	Sep. 30, 2013 Third Quarter [Member]	Sep. 30, 2012 Third Quarter [Member]	Dec. 31, 2013 Fourth Quarter [Member]	Dec. 31, 2012 Fourth Quarter [Member]
Net sales	$ 1,314,223,000	$ 1,227,072,000	$ 968,549,000	$ 278,916,000	$ 265,970,000	$ 297,634,000	$ 288,692,000	$ 394,791,000	$ 356,883,000	$ 342,882,000	$ 315,527,000
Cost of sales	831,847,000	771,370,000	606,601,000	176,318,000	169,877,000	187,056,000	184,438,000	255,088,000	225,668,000	213,385,000	191,387,000
Gross profit	482,376,000	455,702,000	361,948,000	102,598,000	96,093,000	110,578,000	104,254,000	139,703,000	131,215,000	129,497,000	124,140,000
Fees and Commissions				4,366,000	4,473,000	3,699,000	4,252,000	4,937,000	3,875,000	2,630,000	2,795,000
Net Income (Loss) Attributable to Parent	$ 132,007,000	$ 119,626,000	$ 97,319,000	$ 23,400,000	$ 21,868,000	$ 28,956,000	$ 26,899,000	$ 43,992,000	$ 37,896,000	$ 35,659,000	$ 32,963,000
Net income per share: [Abstract]
Earnings Per Share, Basic	$ 2.04	$ 1.85	$ 1.53	$ 0.36	$ 0.34	$ 0.45	$ 0.42	$ 0.68	$ 0.59	$ 0.55	$ 0.51
Earnings Per Share, Diluted	$ 1.98	$ 1.81	$ 1.50	$ 0.35	$ 0.33	$ 0.43	$ 0.41	$ 0.66	$ 0.57	$ 0.54	$ 0.49