Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans with impairment, unpaid principal		$ 8,900		$ 4,200
Gain (Loss) on Disposition of Property Plant Equipment			$ (426)
Small Office Condo [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long Lived Assets To Be Disposed Of Fair Value		$ 345
Proceeds from Sale of Property, Plant, and Equipment	$ 392
Gain (Loss) on Disposition of Property Plant Equipment	$ 47