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Fair Value Measurements (Details 1) - Recurring - Significant Unobservable Inputs (Level 3) - Mortgage servicing rights - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair value of assets
Balance at beginning of period	$ 2,813	$ 2,766	$ 2,713	$ 2,584
Total gains or losses (realized/unrealized): Included in earnings	(8)	(139)	(40)	(72)
Total gains or losses (realized/unrealized): Included in other comprehensive income	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Issues	66	61	198	176
Settlements	0	0	0	0
Balance at end of period	$ 2,871	$ 2,688	$ 2,871	$ 2,688

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Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of issuances of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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