Segments (Schedule of net sales, adjusted EBITDA and certain other measures by reportable segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 350,065	$ 344,586	$ 647,685	$ 624,569
Gross profit	86,411	82,214	157,732	147,456
Depreciation & amortization	3,928	3,410	7,644	6,446
Operating segments [Member] | Geographic divisions [Member]
Segment Reporting Information [Line Items]
Net sales	335,520	331,390	621,521	599,843
Gross profit	83,420	80,002	152,387	143,120
Depreciation & amortization	3,561	3,144	6,959	5,963
Adjusted EBITDA	22,599	21,382	36,334	30,188
Operating segments [Member] | Coleman Floor [Member]
Segment Reporting Information [Line Items]
Net sales	14,545	13,196	26,164	24,726
Gross profit	3,064	2,212	5,418	4,336
Depreciation & amortization	38	29	81	53
Adjusted EBITDA	777	(182)	807	(597)
Other reconciling items [Member] | Other reconciling items [Member]
Segment Reporting Information [Line Items]
Net sales	0	0	0	0
Gross profit	(73)	0	(73)	0
Depreciation & amortization	329	237	604	430
Adjusted EBITDA	$ (9,044)	$ (8,260)	$ (18,875)	$ (16,541)