Employee Benefit Plans (Employee Benefit Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Service cost	$ 277	$ 281	$ 219
Interest cost	3,429	3,519	3,585
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	51,822
Fair value of plan assets at end of year	62,763	51,822
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	85,363	82,289
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year	82,289	66,136
Service cost	277	281
Interest cost	3,429	3,519
Actuarial loss	2,790	15,305
Benefits paid	(3,422)	(2,952)
Projected benefit obligation at end of year	85,363	82,289
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	51,822	55,309
Actual gain (loss) on plan assets	5,866	(2,145)
Employer contributions	8,497	1,610
Benefits paid	(3,422)	(2,952)
Fair value of plan assets at end of year	62,763	51,822
Funded status	$ (22,600)	$ (30,467)