Other Intangible Assets (Net Carrying Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other intangible assets:
Total other intangible assets	$ 28,556	$ 34,271
Core deposit intangible assets
Other intangible assets:
Total other intangible assets	28,556	34,259
Non-compete intangible assets
Other intangible assets:
Total other intangible assets	$ 0	$ 12