SEGMENT AND GEOGRAPHIC REGION INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financial information of segments
SALES	$ 250,026	$ 219,794	$ 221,018	$ 196,662	$ 223,148	$ 239,543	$ 238,650	$ 220,858	$ 887,499	$ 922,200	$ 809,467
INTERSEGMENT SALES									16,617	17,881	17,733
DEPRECIATION AND AMORTIZATION									16,547	17,738	19,461
OPERATING PROFIT									87,901	97,071	64,662
Restructuring and other charges - primarily Office										696	7,565
Curtailment benefit										(5,445)	(338)
CAPITAL EXPENDITURES, NET									16,545	15,175	8,312
Reportable segments
Financial information of segments
OPERATING PROFIT									87,901	92,322	71,889
Office
Financial information of segments
SALES									633,321	664,132	562,304
INTERSEGMENT SALES									1,727	2,148	2,113
DEPRECIATION AND AMORTIZATION									13,409	14,259	15,995
OPERATING PROFIT									48,639	46,614	32,628
CAPITAL EXPENDITURES, NET									14,251	14,142	7,072
Studio
Financial information of segments
SALES									147,550	152,724	151,917
INTERSEGMENT SALES									5,299	5,953	5,845
DEPRECIATION AND AMORTIZATION									2,055	2,124	1,897
OPERATING PROFIT									21,786	23,022	20,880
CAPITAL EXPENDITURES, NET									1,871	1,009	958
Coverings
Financial information of segments
SALES									106,628	105,344	95,246
INTERSEGMENT SALES									9,591	9,780	9,775
DEPRECIATION AND AMORTIZATION									1,083	1,355	1,569
OPERATING PROFIT									17,476	22,686	18,381
CAPITAL EXPENDITURES, NET									$ 423	$ 24	$ 282