RETIREMENT AND DEFERRED COMPENSATION PLANS (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2012
Level 3 | Infrastructure
Change in plan assets:
Fair value of plan assets at end of year	$ 5,670,000	$ 5,472,000	$ 4,567,000
Plan Assets:
Total Investments	5,670,000	5,472,000	4,567,000
Level 3 | Hedge Fund
Change in plan assets:
Fair value of plan assets at end of year	7,497,000	5,508,000
Plan Assets:
Total Investments	7,497,000	5,508,000
Domestic Plans
Change in benefit obligation:
Benefit obligation at the beginning of the period	86,186,000	71,666,000
Service cost	5,436,000	4,675,000	4,363,000
Interest cost	4,504,000	4,106,000	3,820,000
Actuarial loss	18,873,000	8,484,000
Benefits paid	(3,052,000)	(2,745,000)
Benefit obligation at the end of the period	111,947,000	86,186,000	71,666,000
Change in plan assets:
Fair value of plan assets at beginning of year	60,442,000	49,247,000
Actual return on plan assets	(1,141,000)	6,169,000
Employer contribution	12,288,000	7,771,000
Benefits paid	(3,052,000)	(2,745,000)
Fair value of plan assets at end of year	68,537,000	60,442,000	49,247,000
Funded status at end of year	(43,410,000)	(25,744,000)
Funded status amounts recognized in Consolidated Balance Sheet
Current liabilities	(1,053,000)	(205,000)
Non-current liabilities	(42,357,000)	(25,539,000)
Funded status amount	(43,410,000)	(25,744,000)
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss	46,428,000	23,299,000
Net prior service cost	7,000	12,000
Tax effects	(17,414,000)	(8,742,000)
Net amount recognized	29,021,000	14,569,000
Changes in benefit obligations and plan assets recognized in other comprehensive income
Current year actuarial loss	(24,782,000)
Amortization of loss	1,652,000
Amortization of prior service cost	4,000
Net amount recognized	(23,126,000)
Amounts in accumulated other comprehensive loss expected to be recognized as components of periodic benefit cost in 2012
Amortization of net loss	3,396,000
Amortization of prior service cost	4,000
Amount expected to be recognized in next fiscal year	3,400,000
Components of net periodic benefit cost:
Service cost	5,436,000	4,675,000	4,363,000
Interest cost	4,504,000	4,106,000	3,820,000
Expected return on plan assets	(4,790,000)	(4,037,000)	(3,726,000)
Amortization of net loss	1,652,000	628,000	239,000
Amortization of prior service cost	4,000	4,000	4,000
Net periodic benefit cost	6,806,000	5,376,000	4,700,000
Settlement			146,000
Total net periodic benefit cost	6,806,000	5,376,000	4,846,000
Accumulated benefit obligation	99,100,000	75,700,000
Projected benefit obligation ("PBO"), ABO, and fair value of plan assets for all pension plans with an ABO in excess of plan assets
Projected benefit obligation	111,947,000	86,186,000
Accumulated benefit obligation	99,091,000	75,743,000
Fair value of plan assets	68,537,000	60,442,000
PBO, ABO, and fair value of plan assets for all pension plans with a PBO in excess of plan assets
Projected benefit obligation	111,947,000	86,186,000
Accumulated benefit obligation	99,091,000	75,743,000
Fair value of plan assets	68,537,000	60,442,000
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)	4.40%	5.40%
Rate of compensation increase (as a percent)	4.00%	4.00%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate (as a percent)	5.40%	5.90%
Expected long-term return on plan assets (as a percent)	7.00%	7.00%
Rate of compensation increase (as a percent)	4.00%	4.00%
Plan Assets:
Equity securities (as a percent)	60.00%	61.00%
Fixed income securities (as a percent)	32.00%	29.00%
Infrastructure (as a percent)	8.00%	9.00%
Money market (as a percent)		1.00%
Weighted-average asset allocations (as a percent)	100.00%	100.00%
Target allocation, equity securities (as a percent)	60.00%
Target allocation, fixed income securities and infrastructure (as a percent)	40.00%
Total Investments	68,537,000	60,442,000	49,247,000
Employer contributions in current fiscal year	12,288,000	7,771,000
Expected contribution in next fiscal year				12,000,000
Estimated benefit payments relating to defined benefit plans over the next ten years
2012	6,607,000
2013	7,160,000
2014	6,702,000
2015	6,492,000
2016	6,999,000
2017 - 2021	46,407,000
Domestic Plans | Cash and Short Term Securities
Change in plan assets:
Fair value of plan assets at end of year	96,000	497,000
Plan Assets:
Total Investments	96,000	497,000
Domestic Plans | Infrastructure
Change in plan assets:
Fair value of plan assets at end of year	5,670,000	5,472,000
Plan Assets:
Total Investments	5,670,000	5,472,000
Domestic Plans | Equity Securities
Change in plan assets:
Fair value of plan assets at end of year	33,264,000	31,469,000
Plan Assets:
Total Investments	33,264,000	31,469,000
Domestic Plans | Core Fixed Income
Change in plan assets:
Fair value of plan assets at end of year	22,010,000	17,496,000
Plan Assets:
Total Investments	22,010,000	17,496,000
Domestic Plans | Hedge Fund
Change in plan assets:
Fair value of plan assets at end of year	7,497,000	5,508,000
Plan Assets:
Total Investments	7,497,000	5,508,000
Domestic Plans | Level 1
Change in plan assets:
Fair value of plan assets at end of year	55,370,000	49,462,000
Plan Assets:
Total Investments	55,370,000	49,462,000
Domestic Plans | Level 1 | Cash and Short Term Securities
Change in plan assets:
Fair value of plan assets at end of year	96,000	497,000
Plan Assets:
Total Investments	96,000	497,000
Domestic Plans | Level 1 | Cash and Short Term Securities | USD
Change in plan assets:
Fair value of plan assets at end of year	96,000	497,000
Plan Assets:
Total Investments	96,000	497,000
Domestic Plans | Level 1 | Equity Securities
Change in plan assets:
Fair value of plan assets at end of year	33,264,000	31,469,000
Plan Assets:
Total Investments	33,264,000	31,469,000
Domestic Plans | Level 1 | US Large Cap Equities
Change in plan assets:
Fair value of plan assets at end of year	14,215,000	12,419,000
Plan Assets:
Total Investments	14,215,000	12,419,000
Domestic Plans | Level 1 | US Small Cap Equities
Change in plan assets:
Fair value of plan assets at end of year	10,077,000	10,166,000
Plan Assets:
Total Investments	10,077,000	10,166,000
Domestic Plans | Level 1 | International Equities
Change in plan assets:
Fair value of plan assets at end of year	8,972,000	8,884,000
Plan Assets:
Total Investments	8,972,000	8,884,000
Domestic Plans | Level 1 | Core Fixed Income
Change in plan assets:
Fair value of plan assets at end of year	22,010,000	17,496,000
Plan Assets:
Total Investments	22,010,000	17,496,000
Domestic Plans | Level 3
Change in plan assets:
Fair value of plan assets at end of year	13,167,000	10,980,000
Plan Assets:
Total Investments	13,167,000	10,980,000
Domestic Plans | Level 3 | Infrastructure
Change in plan assets:
Fair value of plan assets at end of year	5,670,000	5,472,000
Plan Assets:
Total Investments	5,670,000	5,472,000
Domestic Plans | Level 3 | Hedge Fund
Change in plan assets:
Fair value of plan assets at end of year	7,497,000	5,508,000
Plan Assets:
Total Investments	7,497,000	5,508,000
Foreign Plans
Change in benefit obligation:
Benefit obligation at the beginning of the period	46,673,000	45,330,000
Service cost	2,018,000	1,677,000	1,766,000
Interest cost	2,518,000	2,369,000	2,503,000
Plan amendments		193,000
Curtailment/Settlement	(1,052,000)
Actuarial loss	1,984,000	2,703,000
Benefits paid	(1,509,000)	(3,096,000)
Foreign currency translation adjustment	(1,878,000)	(2,503,000)
Benefit obligation at the end of the period	48,754,000	46,673,000	45,330,000
Change in plan assets:
Fair value of plan assets at beginning of year	38,383,000	33,793,000
Actual return on plan assets	(310,000)	813,000
Employer contribution	5,478,000	8,659,000
Settlements	(1,052,000)
Benefits paid	(1,509,000)	(3,096,000)
Foreign currency translation adjustment	(1,155,000)	(1,786,000)
Fair value of plan assets at end of year	39,835,000	38,383,000	33,793,000
Funded status at end of year	(8,919,000)	(8,290,000)
Funded status amounts recognized in Consolidated Balance Sheet
Current liabilities	(78,000)	(532,000)
Non-current liabilities	(8,840,000)	(7,758,000)
Funded status amount	(8,918,000)	(8,290,000)
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss	11,434,000	8,509,000
Net prior service cost	4,518,000	5,014,000
Tax effects	(5,066,000)	(4,256,000)
Net amount recognized	10,886,000	9,267,000
Changes in benefit obligations and plan assets recognized in other comprehensive income
Current year actuarial loss	(3,903,000)
Amortization of loss	836,000
Amortization of prior service cost	455,000
Net amount recognized	(2,612,000)
Amounts in accumulated other comprehensive loss expected to be recognized as components of periodic benefit cost in 2012
Amortization of net loss	477,000
Amortization of prior service cost	363,000
Amount expected to be recognized in next fiscal year	840,000
Components of net periodic benefit cost:
Service cost	2,018,000	1,677,000	1,766,000
Interest cost	2,518,000	2,369,000	2,503,000
Expected return on plan assets	(1,753,000)	(1,414,000)	(980,000)
Amortization of net loss	836,000	255,000	625,000
Amortization of prior service cost	455,000	359,000	376,000
Net periodic benefit cost	4,074,000	3,246,000	4,290,000
Curtailment			(105,000)
Total net periodic benefit cost	4,074,000	3,246,000	4,185,000
Accumulated benefit obligation	40,500,000	38,800,000
Projected benefit obligation ("PBO"), ABO, and fair value of plan assets for all pension plans with an ABO in excess of plan assets
Projected benefit obligation	32,896,000	17,940,000
Accumulated benefit obligation	25,064,000	17,308,000
Fair value of plan assets	24,280,000	16,357,000
PBO, ABO, and fair value of plan assets for all pension plans with a PBO in excess of plan assets
Projected benefit obligation	34,104,000	44,469,000
Accumulated benefit obligation	25,923,000	36,550,000
Fair value of plan assets	25,140,000	36,179,000
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)	5.10%	5.15%
Rate of compensation increase (as a percent)	3.00%	3.00%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate (as a percent)	5.15%	5.55%
Expected long-term return on plan assets (as a percent)	4.40%	4.55%
Rate of compensation increase (as a percent)	3.00%	3.00%
Plan Assets:
Fixed income securities (as a percent)	12.00%
Money market (as a percent)	15.00%	52.00%
Investment Funds (as a percent)	73.00%	48.00%
Weighted-average asset allocations (as a percent)	100.00%	100.00%
Target allocation, investment funds (as a percent)	83.00%
Target allocation, fixed income securities (as a percent)	13.00%
Target allocation, money market (as a percent)	4.00%
Total Investments	39,835,000	38,383,000	33,793,000
Employer contributions in current fiscal year	5,478,000	8,659,000
Expected contribution in next fiscal year				3,800,000
Estimated benefit payments relating to defined benefit plans over the next ten years
2012	1,768,000
2013	1,625,000
2014	1,708,000
2015	2,165,000
2016	2,897,000
2017 - 2021	17,451,000
Foreign Plans | Cash and Short Term Securities
Change in plan assets:
Fair value of plan assets at end of year	5,781,000	19,925,000
Plan Assets:
Total Investments	5,781,000	19,925,000
Foreign Plans | Corporate debts securities
Change in plan assets:
Fair value of plan assets at end of year	4,812,000
Plan Assets:
Total Investments	4,812,000
Foreign Plans | Investment Funds
Change in plan assets:
Fair value of plan assets at end of year	29,242,000	18,458,000
Plan Assets:
Total Investments	29,242,000	18,458,000
Foreign Plans | Level 1
Change in plan assets:
Fair value of plan assets at end of year	24,669,000	23,467,000
Plan Assets:
Total Investments	24,669,000	23,467,000
Foreign Plans | Level 1 | Cash and Short Term Securities
Change in plan assets:
Fair value of plan assets at end of year	5,781,000	19,925,000
Plan Assets:
Total Investments	5,781,000	19,925,000
Foreign Plans | Level 1 | Cash and Short Term Securities | USD
Change in plan assets:
Fair value of plan assets at end of year		7,324,000
Plan Assets:
Total Investments		7,324,000
Foreign Plans | Level 1 | Cash and Short Term Securities | EUR
Change in plan assets:
Fair value of plan assets at end of year	5,781,000	12,601,000
Plan Assets:
Total Investments	5,781,000	12,601,000
Foreign Plans | Level 1 | Corporate debts securities
Change in plan assets:
Fair value of plan assets at end of year	4,812,000
Plan Assets:
Total Investments	4,812,000
Foreign Plans | Level 1 | Euro Corporate Bonds
Change in plan assets:
Fair value of plan assets at end of year	4,812,000
Plan Assets:
Total Investments	4,812,000
Foreign Plans | Level 1 | Investment Funds
Change in plan assets:
Fair value of plan assets at end of year	14,076,000	3,542,000
Plan Assets:
Total Investments	14,076,000	3,542,000
Foreign Plans | Level 1 | Mutual Funds in Equities
Change in plan assets:
Fair value of plan assets at end of year	5,482,000	3,542,000
Plan Assets:
Total Investments	5,482,000	3,542,000
Foreign Plans | Level 1 | Mutual Funds Diversified
Change in plan assets:
Fair value of plan assets at end of year	8,594,000
Plan Assets:
Total Investments	8,594,000
Foreign Plans | Level 2
Change in plan assets:
Fair value of plan assets at end of year	15,166,000	14,916,000
Plan Assets:
Total Investments	15,166,000	14,916,000
Foreign Plans | Level 2 | Investment Funds
Change in plan assets:
Fair value of plan assets at end of year	15,166,000	14,916,000
Plan Assets:
Total Investments	15,166,000	14,916,000
Foreign Plans | Level 2 | Mutual Funds Diversified
Change in plan assets:
Fair value of plan assets at end of year	15,166,000	14,916,000
Plan Assets:
Total Investments	15,166,000	14,916,000
Non-qualified supplemental pension plan
Estimated benefit payments relating to defined benefit plans over the next ten years
Non funded liability	$ 4,300,000	$ 3,900,000