Commitments and Contingencies - Summary of Cases Dismissed or Judgment Entered (Detail)	12 Months Ended
	Dec. 31, 2013
Armstrong [Member]
Loss Contingencies [Line Items]
Plaintiff	Armstrong
Month Served	Apr-13
Jurisdiction	US District Court, MD NC
Claim Type	Wrongful Death
Status	Voluntary Dismissal
Barnes [Member]
Loss Contingencies [Line Items]
Plaintiff	Barnes
Month Served	Apr-13
Jurisdiction	US District Court, WD PA
Claim Type	Wrongful Death
Status	Voluntary Dismissal
Athetis [Member]
Loss Contingencies [Line Items]
Plaintiff	Athetis
Month Served	May-09
Jurisdiction	Superior Court, AZ
Claim Type	Wrongful Death
Status	Motion for Summary Judgment
Duensing [Member]
Loss Contingencies [Line Items]
Plaintiff	Duensing
Month Served	Feb-12
Jurisdiction	US District Court, NV
Claim Type	Suspect Injury During Arrest
Status	Motion to Dismiss
Rich [Member]
Loss Contingencies [Line Items]
Plaintiff	Rich
Month Served	Feb-10
Jurisdiction	US District Court, NV
Claim Type	Wrongful Death
Status	Voluntary Dismissal
Peppler [Member]
Loss Contingencies [Line Items]
Plaintiff	Peppler
Month Served	Apr-09
Jurisdiction	5th Judicial Court for Sumter CO, FL
Claim Type	Training Injury
Status	Voluntary Dismissal
Wingard [Member]
Loss Contingencies [Line Items]
Plaintiff	Wingard
Month Served	Oct-12
Jurisdiction	US District Court, WD PA
Claim Type	Wrongful Death
Status	Voluntary Dismissal
Manjares [Member]
Loss Contingencies [Line Items]
Plaintiff	Manjares
Month Served	Nov-12
Jurisdiction	US District Court, ED WA
Claim Type	Suspect Injury During Arrest
Status	Voluntary Dismissal