Note 7. Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2011

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Three Months Ended September 30,
	Pension Benefits						Other Benefits
	2011			2010			2011			2010
Service cost	$	969		$	551		$	14		$	11
Interest cost		1,028			931			19			18
Expected return on plan assets		(1,370	)		(1,261	)		(22	)		—
Amortization of prior service cost		101			151			55			14
Amortization of net (gain) loss		220			217			(32	)		(12	)
Net periodic benefit cost	$	948		$	589		$	34		$	31

	Nine Months Ended September 30,
	Pension Benefits						Other Benefits
	2011			2010			2011			2010
Service cost	$	2,908		$	1,652		$	41		$	34
Interest cost		3,085			2,793			58			55
Expected return on plan assets		(4,111	)		(3,781	)		—			—
Amortization of prior service cost		302			452			33			40
Amortization of net (gain) loss		660			650			(32	)		(35	)
Net periodic benefit cost	$	2,844		$	1,766		$	100		$	94