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Pension Plans and Other Postretirement Benefits (Details-4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at end of year	$ 315,000	$ 244,401
Real Estate [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at end of year	19,628	17,141
Insurance Continuance Fund [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at end of year	1,428	1,466
Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at end of year	21,056	18,607
Level 3 [Member] \| Real Estate [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	17,141	15,565
Actual return on plan assets still held	1,565	682
Purchases, sales, and settlements	922	894
Transfers in and/or out of Level 3	0	0
Fair value of plan assets at end of year	19,628	17,141
Level 3 [Member] \| Insurance Continuance Fund [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	1,466	906
Actual return on plan assets still held	42	33
Purchases, sales, and settlements	(80)	527
Transfers in and/or out of Level 3	0	0
Fair value of plan assets at end of year	$ 1,428	$ 1,466

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.

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