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Interest Rate Swap Derivatives (Details 3) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Gross Amount of Recognized Assets	$ 5,792	$ 2,256
Interest Rate Swap [Member]
Gross Amount of Recognized Assets	5,839	2,201
Net amounts of assets presented in the balance sheet	5,839	2,201
Gross amounts not offset in the balance sheet net amount	5,839	2,201
Counter Party 1 [Member] | Interest Rate Swap [Member]
Gross Amount of Recognized Assets	4,595	1,619
Net amounts of assets presented in the balance sheet	4,595	1,619
Gross amounts not offset in the balance sheet net amount	4,595	1,619
Counter Party 2 [Member] | Interest Rate Swap [Member]
Gross Amount of Recognized Assets	1,244	582
Net amounts of assets presented in the balance sheet	1,244	582
Gross amounts not offset in the balance sheet net amount	$ 1,244	$ 582

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