Employee Benefit Plans (Notes)

3 Months Ended

Mar. 31, 2013

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Employee Benefit Plans [Text Block]

13. EMPLOYEE BENEFIT PLANS

The Company has four qualified non-contributory defined benefit pension plans covering a significant majority of its employees and an unfunded plan that provides benefits in excess of amounts allowable under current tax law in the qualified plans. Currently, all qualified plans are closed to new participants. Employee benefit plan liabilities are calculated using actuarial estimates and management assumptions. These estimates are based on historical information, along with certain assumptions about future events. Changes in assumptions, as well as changes in actual experience, could cause the estimates to change.

The net pension and postretirement benefit costs that have been recognized during the stated periods are shown in the following tables:

	Pension						Postretirement
	Three Months Ended March 31,						Three Months Ended March 31,
	2013			2012			2013		2012
Components of Net Periodic Benefit Cost
Service cost	$	2,419		$	1,940		$	249	$	210
Interest cost	4,834			3,989			240		223
Expected return on plan assets	(7,424		)	(5,879		)	—		—
Amortization of prior service cost	388			302			6		6
Amortization of losses	5,727			4,056			218		144
Net periodic benefit cost	$	5,944		$	4,408		$	713	$	583

In 2013, the Company has no mandatory pension contribution requirements, but may make discretionary contributions.