CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Net sales	$ 245,594	$ 230,504	$ 519,647	$ 514,683
Cost of sales	134,961	128,807	276,622	285,720
Gross profit	110,633	101,697	243,025	228,963
Operating expenses:
Selling expense	64,388	59,966	127,674	126,285
General and administrative expense	17,089	15,536	32,633	31,635
Research and development expense	8,288	7,603	16,522	15,519
Total operating expenses	89,765	83,105	176,829	173,439
Income from operations	20,868	18,592	66,196	55,524
Interest income	332	276	494	347
Interest expense	(679)	(2,212)	(1,462)	(4,304)
Gain on sale of golf-related ventures (Note 6)	17,662	0	17,662	0
Other income (expense), net	(2,141)	(2,021)	(7,057)	525
Income before income taxes	36,042	14,635	75,833	52,092
Income tax provision	1,937	1,817	3,338	3,455
Net income	$ 34,105	$ 12,818	$ 72,495	$ 48,637
Earnings per common share:
Basic (in dollars per share)	$ 0.36	$ 0.16	$ 0.77	$ 0.62
Diluted (in dollars per share)	$ 0.36	$ 0.15	$ 0.76	$ 0.54
Weighted-average common shares outstanding:
Basic (in shares)	94,029	78,395	93,990	78,076
Diluted (in shares)	95,893	94,913	95,658	94,406
Dividends paid per common share (usd per share)	$ 0.01	$ 0.01	$ 0.02	$ 0.02