SEGMENT AND GEOGRAPHIC REGION INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Financial information of segments
NET SALES	$ 223,148	$ 239,543	$ 238,650	$ 220,858	$ 239,784	$ 202,149	$ 192,275	$ 175,259	$ 922,200	$ 809,467	$ 780,033
NET INTERSEGMENT SALES									17,881	17,733	15,336
DEPRECIATION AND AMORTIZATION									17,738	19,461	20,579
Restructuring and other charges - primarily Office									696	7,565	11,959
Curtailment benefit									5,445	338	1,063
OPERATING INCOME									97,071	64,662	63,489
CAPITAL EXPENDITURE									15,175	8,312	13,706
Reportable segments
Financial information of segments
OPERATING INCOME									92,322	71,889	74,385
Office
Financial information of segments
NET SALES									664,132	562,304	552,333
NET INTERSEGMENT SALES									2,148	2,113	1,669
DEPRECIATION AND AMORTIZATION									14,259	15,995	17,187
OPERATING INCOME									46,616	32,628	42,707
CAPITAL EXPENDITURE									14,142	7,072	10,643
Studio
Financial information of segments
NET INTERSEGMENT SALES									5,953	5,845	5,308
DEPRECIATION AND AMORTIZATION									2,124	1,897	1,778
OPERATING INCOME									23,022	20,880	15,454
CAPITAL EXPENDITURE									1,009	958	1,922
Coverings
Financial information of segments
NET INTERSEGMENT SALES									9,780	9,775	8,359
DEPRECIATION AND AMORTIZATION									1,355	1,569	1,614
OPERATING INCOME									22,686	18,381	16,224
CAPITAL EXPENDITURE									$ 24	$ 282	$ 1,141