Employee Benefit Plans (Schedule of Net Period Benefit Cost and Other Amounts Recognized in Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Executive Retirement Plan [Member]
Net period benefit cost
Service cost	$ 326	$ 269	$ 232
Interest cost	377	408	431
Recognized net actuarial loss	224	114	67
Recognized prior service cost	19	19	19
Net period benefit cost	946	810	749
Changes in funded status recognized in other comprehensive loss, before taxes
Net actuarial loss	(579)	1,334	615
Amortization of net unrecognized actuarial loss	(224)	(114)	(67)
Amortization of prior service cost	(19)	(19)	(19)
Total recognized in other comprehensive loss	(822)	1,201	529
Total recognized in net period benefit cost and other comprehensive loss	124	2,011	1,278
Other Postretirement Benefit Plan [Member]
Net period benefit cost
Service cost	42	70	65
Interest cost	173	148	150
Recognized net actuarial loss	48	31	5
Recognized prior service cost	(23)
Net period benefit cost	240	249	220
Changes in funded status recognized in other comprehensive loss, before taxes
Net actuarial loss	(538)	275	417
Amortization of net unrecognized actuarial loss	(48)	(31)	(5)
Amortization of prior service cost	23
Total recognized in other comprehensive loss	(563)	244	412
Total recognized in net period benefit cost and other comprehensive loss	$ (323)	$ 493	$ 632