Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands				3 Months Ended		6 Months Ended
	Oct. 01, 2017	Sep. 01, 2017	Mar. 03, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Amortization expense of intangible assets				$ 1,745	$ 1,031	$ 3,417	$ 1,607
Goodwill acquired		$ 5,330
Other amortizable intangible assets		271
Net increase in goodwill	$ 88,235		$ 65,072
Intangible asset	$ 9,880		$ 8,790
Additional amortization expense of servicing assets						351	66
Servicing assets						$ 1,972	$ 513
Customer Lists [Member]
Intangible assets acquired		$ 3,644