Fair Value Measurements (Loss) Gain On Assets and Liabilities Measured On A Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financial Instrument [Line Items]
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis	$ 513	$ (211)	$ 1,569	$ 4,713
Mortgage Loans Held for Sale [Member]
Financial Instrument [Line Items]
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis	(1,383)	(64)	(66)	4,326
Forward Sales of Mortgage Backed Securities [Member]
Financial Instrument [Line Items]
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis	2,407	(128)	1,447	241
Interest Rate Lock Commitments [Member]
Financial Instrument [Line Items]
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis	(763)	22	80	116
Whole Loan Contracts [Member]
Financial Instrument [Line Items]
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis	$ 252	$ (41)	$ 108	$ 30