Background and Basis of Presentation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended			9 Months Ended		0 Months Ended
	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013 item	Sep. 30, 2012	Jan. 31, 2013 Southworth Company
Background and Basis of Presentation
Number of primary operations				2
Potentially dilutive stock-based compensation awards excluded from computation of dilutive common shares	10,000		980,000	600,000	1,030,000
Earnings Per Basic Common Share
Income from continuing operations	$ 11.4		$ 9.2	$ 36.3	$ 30.8
Distributed and undistributed amounts allocated to participating securities	(0.2)		(0.2)	(0.7)	(1.0)
Income from continuing operations available to common stockholders	11.2		9.0	35.6	29.8
Income (loss) from discontinued operations, net of income taxes		2.6	(0.1)	2.6	(0.1)
Net income available to common stockholders	11.2		8.9	38.2	29.7
Weighted-average basic shares outstanding	16,089,000		15,828,000	16,016,000	15,655,000
Basic
Continuing operations (in dollars per share)	$ 0.69		$ 0.56	$ 2.22	$ 1.90
Discontinued operations (in dollars per share)				$ 0.16
Total Basic (in dollars per share)	$ 0.69		$ 0.56	$ 2.38	$ 1.90
Earnings Per Diluted Common Share
Income from continuing operations	11.4		9.2	36.3	30.8
Distributed and undistributed amounts allocated to participating securities	(0.2)		(0.2)	(0.6)	(0.9)
Income from continuing operations available to common stockholders	11.2		9.0	35.7	29.9
Income (loss) from discontinued operations, net of income taxes		2.6	(0.1)	2.6	(0.1)
Net income available to common stockholders	11.2		8.9	38.3	29.8
Weighted-average basic shares outstanding	16,089,000		15,828,000	16,016,000	15,655,000
Add: Assumed incremental shares under stock compensation	380,000		317,000	322,000	327,000
Weighted-average diluted shares	16,469,000		16,145,000	16,338,000	15,982,000
Diluted
Continuing operations (in dollars per share)	$ 0.68		$ 0.55	$ 2.18	$ 1.87
Discontinued operations (in dollars per share)				$ 0.16
Total Diluted (in dollars per share)	$ 0.68		$ 0.55	$ 2.34	$ 1.87
Background and Basis of Presentation
Cash payment				$ 5.2	$ 14.1	$ 7.0