Acquisitions and Dispositions - Fair Value, Valuation Techniques and Related Unobservable Inputs (Detail) - Courier Corporation - Fair Value, Inputs, Level 3 - Fair Value, Measurements, Nonrecurring $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($)
Customer Relationships
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	$ 98.4
Valuation Technique	Excess earnings
Customer Relationships | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Discount rate	14.00%
Attrition rate	0.00%
Customer Relationships | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Discount rate	17.00%
Attrition rate	7.50%
Trade Names
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	$ 10.1
Valuation Technique	Relief-from-royalty method
Discount rate	12.00%
Trade Names | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Royalty rate (pre-tax)	0.30%
Trade Names | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Royalty rate (pre-tax)	1.00%
Technology
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	$ 1.6
Valuation Technique	Relief-from-royalty method
Discount rate	11.00%
Royalty rate (pre-tax)	15.00%
Non-Compete Agreements
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	$ 0.3
Valuation Technique	Excess earnings
Discount rate	17.00%