Lease Commitments (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Operating leases:
2018	$ 699
2019	689
2020	587
2021	554
2022	420
Thereafter	869
Total minimum payments required under operating leases	3,819
Capital leases:
2018	144
2019	141
2020	134
2021	91
2022	49
Total minimum payments required under capital leases	$ 559

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