Fair Value Measurements Balance Sheet Location of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Other Assets [Member]
Financial Insturments, Fair Value [Line Items]
Financial Instrument, Fair Value	$ 2,095	$ 460
Other Liabilities [Member]
Financial Insturments, Fair Value [Line Items]
Fair Value Disclosure, Recurring	0	0
Forward Sales of Mortgage Backed Securities [Member] | Other Assets [Member]
Financial Insturments, Fair Value [Line Items]
Financial Instrument, Fair Value	1,624	177
Forward Sales of Mortgage Backed Securities [Member] | Other Liabilities [Member]
Financial Insturments, Fair Value [Line Items]
Fair Value Disclosure, Recurring	0	0
Interest Rate Lock Commitments [Member] | Other Assets [Member]
Financial Insturments, Fair Value [Line Items]
Financial Instrument, Fair Value	384	271
Interest Rate Lock Commitments [Member] | Other Liabilities [Member]
Financial Insturments, Fair Value [Line Items]
Fair Value Disclosure, Recurring	0	0
Whole Loan Contracts [Member] | Other Assets [Member]
Financial Insturments, Fair Value [Line Items]
Financial Instrument, Fair Value	87	12
Whole Loan Contracts [Member] | Other Liabilities [Member]
Financial Insturments, Fair Value [Line Items]
Fair Value Disclosure, Recurring	$ 0	$ 0