Consolidated Condensed Statements of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net sales	$ 192,993	$ 189,695	$ 380,007	$ 384,011
Cost of sales	90,077	89,963	174,409	183,368
Gross profit	102,916	99,732	205,598	200,643
Selling and administrative expense	77,174	73,707	154,899	148,513
Research and development expense	6,591	7,192	12,285	14,287
Medical device excise tax	1,406	0	2,986	0
Other expense	2,093	1,775	3,906	3,763
Total operating expenses	87,264	82,674	174,076	166,563
Income from operations	15,652	17,058	31,522	34,080
Loss on early extinguishment of debt	0	0	263	0
Interest expense	1,383	1,551	2,749	2,988
Income before income taxes	14,269	15,507	28,510	31,092
Provision for income taxes	4,736	5,211	8,485	10,828
Net income	9,533	10,296	20,025	20,264
Comprehensive income	$ 7,380	$ 7,687	$ 18,754	$ 18,732
Per share data:
Basic (per share)	$ 0.35	$ 0.36	$ 0.72	$ 0.72
Diluted (per share)	$ 0.34	$ 0.36	$ 0.71	$ 0.71
Dividends per share of common stock (in dollars per share)	$ 0.15	$ 0.15	$ 0.30	$ 0.30
Weighted average common shares
Basic	27,591	28,327	27,860	28,178
Diluted	27,983	28,672	28,258	28,577