Pension Postretirement and Postemployment Benefits (Tables)

12 Months Ended

Dec. 31, 2011

Pension, Postretirement and Postemployment Benefits [Abstract]

Pool pension plan

	Pension Benefits
	2011			2010
	(In thousands)
Change in benefit obligation:
Benefit obligation at beginning of year	$	20,628		$	18,865
Remeasurement		1,517			—
Interest cost		1,198			1,116
Actuarial loss (gain)		3,975			1,289
Benefit payments		(659	)		(642	)
Benefit obligation at end of year(1)	$	26,659		$	20,628
Change in plan assets:
Fair value of plan assets at beginning of year	$	15,219		$	14,058
Actual (loss) return on plan assets		480			1,364
Employer contribution		1,312			439
Benefit payments		(659	)		(642	)
Fair value of plan assets at end of year	$	16,352		$	15,219
Funded status:
Underfunded status at end of year	$	(10,307	)	$	(5,409	)
Amounts recognized in consolidated balance sheets:
Other long-term liabilities	$	(10,307	)	$	(5,409	)

	Year Ended December 31,
	2011			2010			2009
Components of net periodic benefit cost (recognized in our consolidated statements of income):
Interest cost	$	1,198		$	1,116		$	1,093
Expected return on plan assets		(1,008	)		(909	)		(794	)
Recognized net actuarial loss		628			457			545
Net periodic benefit cost	$	818		$	664		$	844
Weighted-average assumptions:
Weighted-average discount rate		4.25	%		5.50	%		6.00	%
Expected long-term rate of return on plan assets		6.50	%		6.50	%		6.50	%

(1) As of December 31, 2011 and 2010, the accumulated benefit obligation was the same as the projected benefit obligation.

Investments within the fair value of Pool Pension Plan

	Fair Value as of December 31, 2011
	Level 1		Level 2		Level 3		Total
	(In thousands)
Assets:(1)
Cash	$	—	$	396	$	—	$	396
Short-term investments:
Available-for-sale equity securities(2)		—		9,166		—		9,166
Available-for-sale debt securities(3)		—		6,790		—		6,790
Total investments		—		15,956		—		15,956
Total	$	—	$	16,352	$	—	$	16,352

(1) Includes investments in collective trust funds that are valued based on the fair value of the underlying investments using quoted prices in active markets or other significant inputs that are deemed observable.

(2) Includes funds that invest primarily in U.S. common stocks and foreign equity securities.

(3) Includes funds that invest primarily in investment grade debt.

Weighted-average asset allocations of Pool Pension Plan

	Pension Benefits
	2011			2010
Cash		2	%		2	%
Equity securities		56	%		56	%
Debt securities		42	%		42	%
Total		100	%		100	%

Benefits paid for five years thereafter

	(In thousands)
2012	$	791
2013		890
2014		1,004
2015		1,117
2016		1,193
2017 — 2021		7,428