Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands				3 Months Ended
	Oct. 01, 2017	Sep. 01, 2017	Mar. 03, 2017	Mar. 31, 2018	Mar. 31, 2017
Amortization expense of intangible assets				$ 1,672	$ 576
Goodwill acquired		$ 5,330
Other amortizable intangible assets		271
Net increase in goodwill	$ 87,458		$ 65,072
Intangible asset	$ 9,880		$ 8,790
Additional amortization expense of servicing assets				112	31
Servicing assets				$ 1,154	$ 195
Customer Lists [Member]
Intangible assets acquired		$ 3,644