Basis of Presentation and Nature of Business (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 31, 2017	Mar. 31, 2018
Basis of Presentation and Nature of Business [Abstract]
Increase In Assets As A Result Of Business Combinations		$ 1,600,000
Portfolio Method Reclassified From Accumulated Other Comprehensive Income Loss To Retained Earnings	$ 196

Portfolio Method Reclassified From Accumulated Other Comprehensive Income Loss To Retained Earnings

No definition available.

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