Postretirement Plans (Tables)

6 Months Ended

Jun. 30, 2012

Pension Plans, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Components Of Net Periodic Benefit Cost

	Six months ended June 30						Three months ended June 30
Pension Plans	2012			2011			2012			2011
Service cost		$822			$702			$411			$350
Interest cost	1,502			1,559			751			780
Expected return on plan assets	(1,916		)	(1,870		)	(958		)	(935		)
Amortization of prior service costs	112			121			56			59
Recognized net actuarial loss	968			628			484			314
Settlement and curtailment loss	10			55			3			11
Net periodic benefit cost		$1,498			$1,195			$747			$579
Net periodic benefit cost included in Earnings from operations		$1,248			$915			$593			$389

Other Postretirement Benefit Plans, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Components Of Net Periodic Benefit Cost

	Six months ended June 30						Three months ended June 30
Other Postretirement Benefit Plans	2012			2011			2012			2011
Service cost		$72			$72			$36			$36
Interest cost	158			206			79			103
Expected return on plan assets	(4		)	(2		)	(2		)	(1		)
Amortization of prior service costs	(98		)	(48		)	(49		)	(24		)
Recognized net actuarial loss	60			66			30			33
Settlement and curtailment loss	(2		)
Net periodic benefit cost		$186			$294			$94			$147
Net periodic benefit cost included in Earnings from operations		$282			$280			$133			$118