Employee Benefit Plans Deferred Compensation Plans (Details) (Deferred Compensation Plans [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 plan	Dec. 31, 2013	Dec. 31, 2012
Deferred Compensation Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of deferred compensation plans	2
Basis spread on credit rate	1.50%
Deferred compensation expense	$ 222	$ 210	$ 204