Employee Benefits (Tables)

6 Months Ended

Jun. 30, 2011

Retirement Plans

Schedule Of Net Periodic Benefit Cost

	Three Months Ended June 30,						Six Months Ended June 30,						Twelve Months Ended June 30,
	2011			2010			2011			2010			2011			2010
Components of net periodic benefit cost:
Service cost	$	1,682		$	1,532		$	3,425		$	3,032		$	6,457		$	5,799
Interest cost		3,499			3,390			6,994			6,815			13,808			13,406
Amendments		0			0			0			0			838			0
Expected return on plan assets		(3,515	)		(3,433	)		(7,048	)		(6,933	)		(13,982	)		(14,652	)
Amortization of:
Net loss		1,689			874			3,272			1,774			5,047			2,587
Prior service cost		31			33			58			58			115			115
Net periodic benefit cost	$	3,386		$	2,396		$	6,701		$	4,746		$	12,283		$	7,255

Other Postretirement Benefit Plans [Member]

Schedule of Other Postretirement Plans

	Three Months Ended June 30,						Six Months Ended June 30,						Twelve Months Ended June 30,
	2011			2010			2011			2010			2011			2010
Components of net periodic benefit cost:
Service cost	$	756		$	854		$	1,494		$	1,779		$	3,273		$	3,476
Interest cost		1,399			1,607			2,689			3,332			6,021			6,578
Expected return on plan assets		(454	)		(390	)		(912	)		(765	)		(1,676	)		(1,514	)
Amortization of:
Prior service benefit		(1,481	)		(710	)		(2,963	)		(1,435	)		(4,397	)		(2,869	)
Net (gain) loss		89			(87	)		(19	)		(87	)		(107	)		(87	)
Net periodic benefit cost	$	309		$	1,274		$	289		$	2,824		$	3,114		$	5,584