XML 67 R83.htm IDEA: XBRL DOCUMENT

Pension Plans and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Qualified Defined Contribution Plan [Member]
Summary of contributions to qualified defined contribution plan, 401(k), non-qualified defined contribution plan and total assets of the plans
Contributions to employee's accounts	$ 4,148	$ 4,864	$ 5,252
Total assets at the end of the year	141,286	149,675	148,897
401 K [Member]
Summary of contributions to qualified defined contribution plan, 401(k), non-qualified defined contribution plan and total assets of the plans
Contributions to employee's accounts	2,753	2,856	3,011
Total assets at the end of the year	118,073	111,370	117,814
Non Qualified Defined Contribution [Member]
Summary of contributions to qualified defined contribution plan, 401(k), non-qualified defined contribution plan and total assets of the plans
Contributions to employee's accounts
Total assets at the end of the year

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