RETIREMENT AND POSTRETIREMENT BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2012

RETIREMENT AND POSTRETIREMENT BENEFIT PLANS

Components of total pension cost

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Service cost	$	5,970		$	4,326		$	10,849		$	8,661
Interest cost	10,491			10,983			20,729			21,940
Expected return on plan assets	(14,983		)	(14,383		)	(29,371		)	(28,738		)
Amortization of prior service cost	(23		)	(16		)	(45		)	(31		)
Amortization of net loss	7,749			5,476			15,543			10,948
Defined benefit plans	9,204			6,386			17,705			12,780
Multi-employer plans	225			241			467			476
Defined contribution plans	2,353			2,137			4,597			4,190
Total pension cost	$	11,782		$	8,764		$	22,769		$	17,446