XML 61 R86.htm IDEA: XBRL DOCUMENT

Benefit Plans (Details 3) (Pension Plans [Member], USD $) In Thousands, unless otherwise specified								12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Debt Securities [Member]	Dec. 31, 2010 Debt Securities [Member]	Dec. 31, 2011 Venture Capital and Partnerships [Member]	Dec. 31, 2010 Venture Capital and Partnerships [Member]	Dec. 31, 2011 Level 3 [Member]	Dec. 31, 2010 Level 3 [Member]	Dec. 31, 2011 Level 3 [Member] Debt Securities [Member]	Dec. 31, 2010 Level 3 [Member] Debt Securities [Member]	Dec. 31, 2011 Level 3 [Member] Venture Capital and Partnerships [Member]	Dec. 31, 2010 Level 3 [Member] Venture Capital and Partnerships [Member]
Reconciliation of the fair value measurements using significant unobservable inputs (Level 3)
Fair value of assets at beginning of year	$ 636,648	$ 630,303	$ 493,646	$ 152,240	$ 127,501	$ 106,801	$ 96,244	$ 96,552	$ 93,582	$ 308	$ 320	$ 96,244	$ 93,262
Actual return on plan assets
Relating to assets still held at December 31, 2010								13,696	4,728	0	1	13,696	4,727
Relating to assets sold during the year ended December 31, 2010								0	0	0	0	0	0
Purchases, sales and settlements, net								(3,139)	(1,758)	0	(13)	(3,139)	(1,745)
Transfers in (out) of Level 3								(308)	0	(308)	0	0	0
Fair value of assets at end of year	$ 636,648	$ 630,303	$ 493,646	$ 152,240	$ 127,501	$ 106,801	$ 96,244	$ 106,801	$ 96,552	$ 0	$ 308	$ 106,801	$ 96,244

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References+ Details