Equity - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Mar. 31, 2014	Sep. 30, 2015	Sep. 30, 2014
Common Stock
Equity [Line Items]
Issuances of stock			$ 154.2	$ 300.7
Common Stock | Courier Corporation
Equity [Line Items]
Issuances of stock	$ 154.2
Common Stock | Consolidated Graphics, Inc
Equity [Line Items]
Issuances of stock		$ 300.7
Treasury Stock
Equity [Line Items]
Issuances of stock				$ 18.3
Treasury Stock | Esselte Corporation
Equity [Line Items]
Issuances of stock		$ 18.3