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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of provision for income taxes
Taxes currently payable									$ 3,348	$ 3,379	$ 1,885
Impact of TCJA									(1,730)
Deferred provision									(788)	738	1,519
Income tax expense	$ (592)	$ 1,117	$ 1,102	$ 933	$ 1,099	$ 1,209	$ 1,058	$ 751	$ 2,560	$ 4,117	$ 3,404

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Impact of TCJA.

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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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