Loans and Allowance for Loan Losses, Rollforward of Purchase Credit Impaired Loans (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Business Combination, Acquired Receivables [Abstract]
Gross Contractual Receivable	$ 12,468
Acquisitions	0
Settlements	(1,814)
Additional fundings	5
Gross Contractual Receivable	10,659
Accretable Yield	0
Acquired Accretable Yield	0
Settlements	0
Additional fundings	0
Accretable Yield	0
Nonaccretable Yield	(3,633)
Acquired Nonaccretable Yield	0
Settlements	252
Additional fundings	0
Nonaccretable Yield	(3,381)
Carrying Value	8,835
Acquisitions	0
Settlements	(1,562)
Additional fundings	5
Carrying Value	$ 7,278