Acquisition - Summary of Acquired Impaired Loans (Details) - Valley Green Bank [Member] $ in Thousands	Jan. 01, 2015 USD ($)
Business Acquisition [Line Items]
Contractually required principal and interest payments	$ 7,429
Contractual cash flows not expected to be collected (nonaccretable difference)	(5,166)
Cash flows expected to be collected	2,263
Interest component of expected cash flows (accretable difference)	(352)
Fair value of loans acquired with a deterioration of credit quality	$ 1,911