Employee Benefit Plans Fair Values of Plan Investments by Hierarchy Level (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 15,717	$ 17,300	$ 18,000
Interest bearing deposits in banks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	131	232
U.S. Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	341	347
Corporate bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,569	4,628
Marketable equity securities [Member] | Information technology [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,544	1,292
Marketable equity securities [Member] | Financial [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,368	1,961
Marketable equity securities [Member] | Industrials [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	945	952
Marketable equity securities [Member] | Healthcare [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,746	2,519
Marketable equity securities [Member] | Consumer [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,346	3,213
Marketable equity securities [Member] | Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,154	1,546
Mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	573	610
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,020	14,916
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	341	347
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,003	2,476
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Marketable equity securities [Member] | Information technology [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,544	1,292
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Marketable equity securities [Member] | Financial [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,368	1,961
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Marketable equity securities [Member] | Industrials [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	945	952
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Marketable equity securities [Member] | Healthcare [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,746	2,519
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Marketable equity securities [Member] | Consumer [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,346	3,213
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Marketable equity securities [Member] | Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,154	1,546
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	573	610
Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,697	2,384
Significant Other Observable Inputs (Level 2) [Member] | Interest bearing deposits in banks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	131	232
Significant Other Observable Inputs (Level 2) [Member] | Corporate bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 2,566	$ 2,152