Note 7. Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2012

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Three Months Ended June 30,
	Pension Benefits						Other Benefits
	2012			2011			2012			2011
Service cost	$	994		$	970		$	17		$	13
Interest cost		1,017			1,029			20			20
Expected return on plan assets		(1,145	)		(1,371	)		22			22
Amortization of prior service cost		100			100			(26	)		(33	)
Amortization of net (gain) loss		706			220			7			11
Net periodic benefit cost	$	1,672		$	948		$	40		$	33

	Six Months Ended June 30,
	Pension Benefits						Other Benefits
	2012			2011			2012			2011
Service cost	$	1,987		$	1,939		$	34		$	27
Interest cost		2,034			2,057			39			39
Expected return on plan assets		(2,290	)		(2,741	)		22			22
Amortization of prior service cost		200			201			(15	)		(22	)
Amortization of net (gain) loss		1,413			440			—			—
Net periodic benefit cost	$	3,344		$	1,896		$	80		$	66