Fair Value of Financial Instruments - Measurement (Details) - Nonrecurring [Member] - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases	$ 2,300	$ 6,102
Other real estate owned	925	1,471
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases	2,300	6,102
Other real estate owned	$ 925	$ 1,471