Commitments and Contingencies - Additional Information (Detail) $ in Thousands, CAD in Millions									1 Months Ended							3 Months Ended	4 Months Ended		5 Months Ended	6 Months Ended		7 Months Ended		10 Months Ended	12 Months Ended							13 Months Ended	36 Months Ended			72 Months Ended
	Sep. 12, 2016 plaintiff	Jun. 03, 2016 CAD	Jun. 03, 2016 USD ($)	May 13, 2016 plaintiff case	Apr. 24, 2015 Plaintiff	Jan. 12, 2015 Plaintiff	Sep. 17, 2014 Plaintiff case	Nov. 30, 2012 Plaintiff	Nov. 30, 2015 Plaintiff	Feb. 28, 2015 Plaintiff	Jan. 31, 2015 Plaintiff Case case	Dec. 31, 2014 Plaintiff	Mar. 31, 2014 Plaintiff	Dec. 31, 2012 Plaintiff	Nov. 30, 2011 Plaintiff	Jan. 31, 2016 Case	Jul. 31, 2013 Plaintiff	Apr. 22, 2011 Plaintiff	Dec. 31, 2015 USD ($) Plaintiff case	Jun. 30, 2016 USD ($) Plaintiff plaintiff	Jun. 30, 2015 USD ($)	Nov. 30, 2016 plaintiff	Oct. 31, 2012 Plaintiff Case	Mar. 31, 2014 case	Dec. 31, 2013 USD ($) plaintiff	Apr. 22, 2011 USD ($)	Dec. 31, 2010 Plaintiff	Dec. 31, 2010 plaintiff	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($) Plaintiff plaintiff Case case	Dec. 31, 2008 Plaintiff leased_unit	Jun. 30, 2014 case	Dec. 31, 2009 Plaintiff Case case	Dec. 31, 2009 Case case	Dec. 31, 2009 Case case	Dec. 31, 2004 plaintiff case	May 31, 2016 Case	Apr. 29, 2011	Jan. 04, 2011 Plaintiff
Commitments Disclosure [Line Items]
Outstanding letters of credit and bonds | $																				$ 23,600
Reserves related to environmental remediation | $																			$ 900	600
Number of plaintiffs cases dismissed (plaintiff)								2
Reimbursement | $																				$ 100	$ 100
Minimum
Commitments Disclosure [Line Items]
Warranty maturity periods																				1 year
Maximum
Commitments Disclosure [Line Items]
Warranty maturity periods																				5 years
Circuit Court Of Cook County
Commitments Disclosure [Line Items]
Number of cases filed by firefighters (case) | case																														6			6	6	6	33
Number of plaintiffs (plaintiff) | plaintiff																									74											2,443
Number of cases of plaintiff's claims (case)																															27
Number of claimants settled (plaintiff)																																							308
Court of Common Pleas, Philadelphia County
Commitments Disclosure [Line Items]
Number of cases filed by firefighters (case) | Case																														71			71	71	71
Number of plaintiffs (plaintiff)																																	71
Number of cases of plaintiff's claims (case)																																		4	3
Number of claims dismissed (case) | Case																																		3
Damages maximum amount | $																													$ 100
Number of claimants settled (plaintiff)																																							1,125
Settlement Agreement payment made | $																													$ 80
Settlement Agreement
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff)																		1,069
Claims settled amount | $																									$ 3,800
Percentage of claimants agreed for settlement																		95.02%								95.02%												93.00%
Percentage of claimants agreed for settlement as per settlement agreement																																						100.00%
Settlement Agreement payment made | $																										$ 3,600
Supreme Court of Kings County New York
Commitments Disclosure [Line Items]
Number of new claims filed (case) | case																																			4
Latvian Commercial Dispute
Commitments Disclosure [Line Items]
Number of Bronto units sold (leased unit) | leased_unit																															3
Percent of liability owed from litigation																				50.00%
Percent of legal fees																				50.00%
Charge in period from litigation | $																				$ 1,500
Outside Chicago Firefighter Plaintiffs
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff)						1,800
Outside Chicago Firefighter Plaintiffs | Circuit Court Of Cook County
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff) | plaintiff																																				1,800
Pennsylvania Firefighter Plaintiffs | Circuit Court Of Cook County
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff) | plaintiff																														299
Chicago Firefighter Plaintiffs
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff)								3						3	8
Chicago Firefighter Plaintiffs | Minimum
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff) | plaintiff																														9
Chicago Firefighter Plaintiffs | Maximum
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff)																														40
Chicago Firefighter Plaintiffs | Circuit Court Of Cook County
Commitments Disclosure [Line Items]
Plaintiff's counsel later moved to reduce the number of plaintiffs (plaintiff)																														9
Claims settled amount | $																														$ 400
Philadelphia Firefighter Plaintiffs | Court of Common Pleas, Philadelphia County
Commitments Disclosure [Line Items]
Number of cases filed by firefighters (case)				4																			20
Number of plaintiffs (plaintiff)				55							70	3											20				9	9
Number of claims dismissed (case) | case																								5
Number of cases set for trial (case) | case																																7
Number of new claims filed (case)											2								9
Philadelphia Firefighter Plaintiffs | Court of Common Pleas, Philadelphia County | Scenario, Forecast
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff) | plaintiff	4
District of Columbia Firefighter Plaintiffs | Federal Court, Eastern District of Pennsylvania
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff)											11								193
Number of new claims filed (case) | case											1
Pittsburgh Firefighter Plaintiffs | Allegheny County, Pennsylvania
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff)																	247
Number of claims dismissed (case)																	55
Pittsburgh Firefighter Plaintiffs | Allegheny County, Pennsylvania | Scenario, Forecast
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff) | plaintiff																						8
Erie County Firefighter Plaintiffs | Court of Common Pleas, Philadelphia County
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff)													61
Number of claims dismissed (case)													33
Buffalo Firefighter Plaintiffs | Supreme Court of State of New York Erie County
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff)							193
Number of new claims filed (case) | case							20
New York City Firefighter Plaintiffs | Supreme Court of State of New York, New York County
Commitments Disclosure [Line Items]
Number of cases filed by firefighters (case) | Case																28
Number of plaintiffs (plaintiff)					8					1						227				428
New Jersey Firefighter Plaintiffs
Commitments Disclosure [Line Items]
Number of cases filed by firefighters (case) | Case																																					8
Number of plaintiffs (plaintiff)																				104
New Jersey Firefighter Plaintiffs | Superior Court of New Jersey, Union County
Commitments Disclosure [Line Items]
Number of plaintiffs (plaintiff)									34
JJE
Commitments Disclosure [Line Items]
Deferred payment		CAD 8.0	$ 6,200
Property Lease Guarantee
Commitments Disclosure [Line Items]
Single year cash payments | $																				$ 2,300
Maximum potential cash payments | $																				4,400
Guarantee Obligations
Commitments Disclosure [Line Items]
Potential cash payments | $																				$ 2,700