Other Current Liabilities - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Extremity Fixation Restructuring Plan [Member]
Other Current Liabilities [Line Items]
Pre-tax restructuring expense	$ 3.2
Restructuring costs and expenses incurred		$ 1.3	$ 2.0
Inventory write-down charges			0.4
Restructuring reserve, accrual adjustment	0.1
Accrued in other current liabilities related to restructuring		0.7	1.5
Payments for restructuring	0.5	2.1	$ 0.1
Remaining accrual other current liablities	0.1
U.S. Restructuring Plan [Member]
Other Current Liabilities [Line Items]
Accrued in other current liabilities related to restructuring		1.1
Payments for restructuring	$ 1.1	0.6
U.S. Restructuring Plan [Member] | Operating Expense [Member]
Other Current Liabilities [Line Items]
Pre-tax restructuring expense		$ 1.7