Other Assets and Other liabilities - Summary of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Assets And Other Liabilities [Abstract]
Cash surrender value on bank owned life insurance	$ 10,556	$ 10,331
Prepaid expenses	2,245	2,311
Derivatives	19,745	6,023
Other assets	18,808	8,912
Total other assets	$ 51,354	$ 27,577