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RETIREMENT AND DEFERRED COMPENSATION PLANS (Details 2) (Level 3, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Infrastructure
Summary of changes in fair value of pension plan investments classified as Level 3
Fair value of plan assets at beginning of year	$ 5,670	$ 5,472
Purchases, sales and settlements, net	1,800
Return on assets held	696	347
Admin fees and other	(151)	(149)
Fair value of plan assets at end of year	8,015	5,670
Hedge Fund
Summary of changes in fair value of pension plan investments classified as Level 3
Fair value of plan assets at beginning of year	7,497	5,508
Purchases, sales and settlements, net	1,000	1,800
Return on assets held	78	189
Fair value of plan assets at end of year	$ 8,575	$ 7,497

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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