Employee Benefit Plans (Projected Benefit Obligation) (Details) (SERP And Restoration Plans [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Change in projected benefit obligation:
Benefit obligation at beginning of period	$ 27,059		$ 34,102
Service costs	282		637
Interest costs	1,233		1,293
Actuarial losses/(gains)	5,564		(5,826)
Benefits paid	(1,879)		(3,147)
Projected benefit obligation at end of period	32,259		27,059
Change in plan assets:
Benefits paid	(1,879)		(3,147)
Plan assets at fair value at end of the period	0		0	1,432
Unfunded status of the plans	(32,259)		(27,059)
Accrued benefit liability	(32,259)		(27,059)
Pension plan asset	0		0
Projected benefit obligation at end of period	(32,259)		(27,059)
Amounts recognized in accumulated other comprehensive income/(loss):
Unrecognized net actuarial loss	13,685	[1]	8,840
Unrecognized prior service credit	(6,775)		(7,920)
Pension and other postretirement benefit plans, amount recognized in accumulated other comprehensive income	6,910		920
Change in Plan Assets [Member]
Change in projected benefit obligation:
Benefits paid			(3,149)
Change in plan assets:
Actual return on plan assets			(53)
Benefits paid			(3,149)
Change in Plan Assets [Member]
Change in projected benefit obligation:
Benefits paid	(1,879)
Change in plan assets:
Actual return on plan assets	0
Company contributions	1,879		1,770
Benefits paid	$ (1,879)

[1] The risk-free interest rate for the periods within the contractual term of the PBRSUs is based on the U.S. Treasury yield curve in effect at the time of the grant.