Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended			9 Months Ended	12 Months Ended
	Jan. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2014	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2012	Dec. 31, 2015	Dec. 31, 2014
Commitment And Contingencies [Line Items]
Settlement of claims, amount received (paid)			$ 3,000	$ (1,300)
Contingencies, settlement agreement, terms						During the third quarter of 2016, the Company entered into an agreement to settle an outstanding commercial litigation matter, whereby the Company became entitled to receive a $3.0 million cash payment, which payment was made to the Company during the fourth quarter of 2016, which was recorded as a credit to general and administrative expense.
Judgments and settlement costs		$ 900				$ 900		$ 300	$ 3,800
Discontinued operations for compensatory damages and exemplary damages		2,400				2,400
Litigation Related To Promeca [Member]
Commitment And Contingencies [Line Items]
Deferred prosecution agreement term							3 years
Sec Matter [Member]
Commitment And Contingencies [Line Items]
Charges related to U.S. Government resolutions						8,250
Escrow deposit		8,250				$ 8,250
Sec Matter [Member] | Subsequent Event [Member]
Commitment And Contingencies [Line Items]
Accrual payment related to U.S. Government resolutions	$ 8,250
Brazil Related Allegations [Member]
Commitment And Contingencies [Line Items]
Allegations related charge					$ 6,100
General and Administrative Expense [Member]
Commitment And Contingencies [Line Items]
Settlement of claims, amount received (paid)		$ 3,000