Document And Entity Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jul. 02, 2011	Feb. 28, 2012 Class A [Member]	Feb. 28, 2012 Class B [Member]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Trading Symbol	atx
Entity Registrant Name	CROSS A T CO
Entity Central Index Key	0000025793
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Public Float		$ 102.3
Entity Common Stock, Shares Outstanding			11,460,271	1,804,800