Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2012

Employee Benefit Plans [Abstract]

Components of net periodic benefit cost

	Pension Benefits						Other Postretirement Benefits
	2012			2011			2012			2011
Service cost	$	26		$	28		$	1		$	1
Interest cost		63			64			5			5
Expected return on plan assets		(78	)		(74	)		(3	)		(4	)
Amortization of prior service credit		(2	)		(2	)		—			—
Amortization of actuarial loss		53			37			—			—
Net periodic benefit cost	$	62		$	53		$	3		$	2