Commitments and Contingencies - Summary of Outstanding Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Loans held-for-sale
Commitments and Contingencies
Commitments to extend credit – fixed rate	$ 21,900	$ 15,400
Commitments to extend credit
Commitments and Contingencies
Commitments to extend credit – adjustable rate	180,144	227,966
Commitments to extend credit – fixed rate	61,404	131,641
Commitments to purchase or sell loans	36,158	29,754
Commitments to purchase – adjustable rate
Commitments and Contingencies
Commitments to purchase or sell loans	6,099	3,339
Commitments to purchase – fixed rate
Commitments and Contingencies
Commitments to purchase or sell loans	49,109	19,685
Commitments to extend credit on consumer and other loans
Commitments and Contingencies
Commitments to extend credit on consumer and other loans	5,820	16,157
Home equity and other consumer loans
Commitments and Contingencies
Unused lines of credit	68,902	79,119
Commercial and industrial loans
Commitments and Contingencies
Unused lines of credit	$ 148,899	$ 107,625