Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended	3 Months Ended		1 Months Ended		12 Months Ended
	Mar. 31, 2014 Cases Lawsuits	Sep. 30, 2011 Cases	Dec. 31, 2012	Dec. 31, 2013 AA And Saba Consultants [Member]	Feb. 28, 2014 AA And Saba Consultants [Member]	Mar. 31, 2012 Slade [Member]	Jul. 31, 2011 Slade [Member]	Dec. 31, 2012 Slade [Member]	Dec. 31, 2011 Slade [Member]	May 04, 2012 Slade [Member]	Apr. 20, 2012 Slade [Member]	Dec. 31, 2013 Ramsey [Member]
Loss Contingencies [Line Items]
Number of lawsuits against Company	18
Number of lawsuit	0
Number of active product liability cases	18	55
Jury decision against company							$ 10.0
Litigation judgment									3.3
Jury award value						4.4
Jury decision against company which adjusted to award										5.5	5.5
Benefit on reversal of accrued litigation								2.2
Benefit on reversal of accrued litigation leaving a reserve								1.1				0
Settlement amount of litigation	3.4
Litigation settlement saving off	2.1
Litigation settlement Judgement vacated on appeal	5.5
Litigation settlement payment by insurance	2.7
Litigation settlement amount payable	0.7
Amount of settlement offer			0.8
Verdict against the company					3.3
Loss contingency loss in period				$ 2.6