Revenues (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables present revenue disaggregated by primary geographic market where the products are sold, by product line and timing of revenue recognition:

	Three Months Ended						Three Months Ended
	September 30, 2018						September 30, 2017
	Orthopedic Surgery		General Surgery		Total		Orthopedic Surgery		General Surgery		Total
Primary Geographic Markets
United States	$	39,574	$	67,955	$	107,529	$	38,044	$	60,260	$	98,304
Americas (excluding the United States)	14,949		7,347		22,296		15,147		7,945		23,092
Europe, Middle East & Africa	23,206		11,492		34,698		22,623		11,027		33,650
Asia Pacific	25,200		12,584		37,784		22,767		12,304		35,071
Total sales from contracts with customers	$	102,929	$	99,378	$	202,307	$	98,581	$	91,536	$	190,117
Timing of Revenue Recognition
Goods transferred at a point in time	$	94,640	$	98,992	$	193,632	$	91,047	$	91,307	$	182,354
Services transferred over time	8,289		386		8,675		7,534		229		7,763
Total sales from contracts with customers	$	102,929	$	99,378	$	202,307	$	98,581	$	91,536	$	190,117

	Nine Months Ended						Nine Months Ended
	September 30, 2018						September 30, 2017
	Orthopedic Surgery		General Surgery		Total		Orthopedic Surgery		General Surgery		Total
Primary Geographic Markets
United States	$	123,782	$	199,653	$	323,435	$	121,320	$	176,421	$	297,741
Americas (excluding the United States)	48,307		23,374		71,681		43,256		22,902		66,158
Europe, Middle East & Africa	80,951		38,420		119,371		76,774		35,655		112,429
Asia Pacific	68,883		33,821		102,704		66,581		30,928		97,509
Total sales from contracts with customers	$	321,923	$	295,268	$	617,191	$	307,931	$	265,906	$	573,837
Timing of Revenue Recognition
Goods transferred at a point in time	$	297,096	$	294,196	$	591,292	$	283,728	$	265,391	$	549,119
Services transferred over time	24,827		1,072		25,899		24,203		515		24,718
Total sales from contracts with customers	$	321,923	$	295,268	$	617,191	$	307,931	$	265,906	$	573,837

Contract with Customer, Asset and Liability

Contract liability balances related to the sale of extended warranties to customers are as follows:

	September 30, 2018		December 31, 2017
Contract liability	$	10,375	$	7,786