Note 7. Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2012

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Three Months Ended September 30,
	Pension Benefits						Other Benefits
	2012			2011			2012			2011
Service cost	$	993		$	969		$	17		$	14
Interest cost		1,017			1,028			19			19
Expected return on plan assets		(1,145	)		(1,370	)		(22	)		(22	)
Amortization of prior service cost		101			101			48			55
Amortization of net (gain) loss		706			220			(22	)		(32	)
Net periodic benefit cost	$	1,672		$	948		$	40		$	34

	Nine Months Ended September 30,
	Pension Benefits						Other Benefits
	2012			2011			2012			2011
Service cost	$	2,980		$	2,908		$	51		$	41
Interest cost		3,051			3,085			58			58
Expected return on plan assets		(3,435	)		(4,111	)		—			—
Amortization of prior service cost		301			302			33			33
Amortization of net (gain) loss		2,119			660			(22	)		(32	)
Net periodic benefit cost	$	5,016		$	2,844		$	120		$	100