Employee Benefit Plans (Reconciliation of Benefit Obligations, Plan Assets and Funded Status) (Details) (Pension Plans, Defined Benefit, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension Plans, Defined Benefit
Defined Benefit Plan, Change in Benefit Obligation
Benefit obligation at beginning of plan year	$ 49,009	$ 50,416
Service cost	6	464	1,857
Interest cost	2,205	2,415	2,473
Actuarial loss	3,565	1,021
Benefits paid	(4,085)	(5,307)
Benefit obligation and funded status at end of year	50,700	49,009	50,416
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of plan year	43,852	49,537
Actual return on plan assets	5,683	(378)
Company contributions	1,097	0
Benefits paid	(4,085)	(5,307)
Fair value of plan assets at measurement date	46,547	43,852	49,537
Benefit obligation in excess of plan assets	(4,153)	(5,157)
Accrued pension liability	$ (4,153)	$ (5,157)