Employee Retirement Plans (Schedule of Defined Benefit Plan, Amounts Recognized in Consolidated Financial Statements) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Accrued pension liability: Current portion	$ (372)	$ (395)	$ (415)
Accrued pension liability: Long term portion	(1,313)	(1,566)	(1,764)
Pre-tax accumulated other comprehensive income – retirement benefit liability adjustment	208	155	149
Net amount recognized	$ (1,893)	$ (2,116)	$ (2,328)