Recent Accounting Developments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
The Tax Act [Abstract]
Corporate income tax rate	21.00%	35.00%	35.00%
Net reclassification between AOCI and retained earnings		$ 0
Retained Earnings [Member]
The Tax Act [Abstract]
Net reclassification between AOCI and retained earnings		144
AOCI [Member]
The Tax Act [Abstract]
Net reclassification between AOCI and retained earnings		(144)
Accounting Standards Update 2018-02 [Member] | Retained Earnings [Member]
The Tax Act [Abstract]
Net reclassification between AOCI and retained earnings		144
Accounting Standards Update 2018-02 [Member] | AOCI [Member]
The Tax Act [Abstract]
Net reclassification between AOCI and retained earnings		$ (144)