Accounting for Certain Loans Acquired in a Purchase - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Receivables [Abstract]
Outstanding balance amount of loans acquired	$ 60,500,000	$ 95,800,000
Carrying amount of loans acquired	43,200,000	69,600,000
Allowance for loan losses and provision expense	$ 0	$ 153,000