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Employee Benefit Plans (Schedule of Fair Value of Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Quoted Prices in Market for Identical Assets (Level 1) [Member]
Fair value of plan assets	$ 267
Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	38,903	41,306
Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets
Fair Value Total [Member]
Fair value of plan assets	39,170	41,306
Cash and cash equivalents (money market fund) [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]
Fair value of plan assets	267
Cash and cash equivalents (money market fund) [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets		41,306
Cash and cash equivalents (money market fund) [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets
Cash and cash equivalents (money market fund) [Member] | Fair Value Total [Member]
Fair value of plan assets	267	$ 41,306
Investment funds - Fixed income funds [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]
Fair value of plan assets
Investment funds - Fixed income funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	38,903
Investment funds - Fixed income funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets
Investment funds - Fixed income funds [Member] | Fair Value Total [Member]
Fair value of plan assets	$ 38,903

X

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

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