Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2011

Employee Benefit Plans

Consolidated Net Periodic Benefit Costs

	Three Months  Ended June 30, 2010						Three Months  Ended June 30, 2011
	Pension Benefits			Other  Post- Retirement Benefits			Pension Benefits			Other  Post- Retirement Benefits
Components of net periodic benefit costs:
Service cost	$	1,416		$	88		$	1,985		$	91
Interest cost	800			203			950			260
Expected return on plan assets	(920		)	—			(1,022		)	—
Amortization of prior service cost (credit)	77			(212		)	77			(213		)
Amortization of actuarial loss	99			—			151			62
Net periodic benefit cost	$	1,472		$	79		$	2,141		$	200

	Six Months  Ended June 30, 2010						Six Months  Ended June 30, 2011
	Pension Benefits			Other  Post- Retirement Benefits			Pension Benefits			Other  Post- Retirement Benefits
Components of net periodic benefit costs:
Service cost	$	3,353		$	176		$	3,970		$	182
Interest cost	1,666			406			1,899			519
Expected return on plan assets	(1,774		)	—			(2,043		)	—
Amortization of prior service cost (credit)	154			(425		)	154			(426		)
Amortization of actuarial loss	250			—			302			125
Net periodic benefit cost	$	3,649		$	157		$	4,282		$	400