Postretirement Plans (Tables)

6 Months Ended

Jun. 30, 2013

Pension Plans, Defined Benefit [Member]

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

Schedule of Net Benefit Costs [Table Text Block]

The components of net periodic benefit cost were as follows:

	Six months ended June 30						Three months ended June 30
Pension Plans	2013			2012			2013			2012
Service cost		$946			$822			$473			$411
Interest cost	1,462			1,502			731			751
Expected return on plan assets	(1,938		)	(1,916		)	(969		)	(958		)
Amortization of prior service costs	98			112			49			56
Recognized net actuarial loss	1,138			968			569			484
Settlement and curtailment loss	20			10						3
Net periodic benefit cost		$1,726			$1,498			$853			$747
Net periodic benefit cost included in Earnings from operations		$1,544			$1,248			$753			$593

Other Postretirement Benefit Plans, Defined Benefit [Member]

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

Schedule of Net Benefit Costs [Table Text Block]

	Six months ended June 30						Three months ended June 30
Other Postretirement Benefit Plans	2013			2012			2013			2012
Service cost		$74			$72			$37			$36
Interest cost	133			158			66			79
Expected return on plan assets	(4		)	(4		)	(2		)	(2		)
Amortization of prior service costs	(90		)	(98		)	(45		)	(49		)
Recognized net actuarial loss	48			60			24			30
Settlement and curtailment gain				(2		)
Net periodic benefit cost		$161			$186			$80			$94
Net periodic benefit cost included in Earnings from operations		$179			$282			$88			$133