Non Purchased Loans - (Details 3) - Non purchased loans and leases - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Investment and interest income recognized on impaired loans
Average Recorded Investment	$ 29,234	$ 29,858
Interest Income Recognized	171	206
Commercial, financial, agricultural
Investment and interest income recognized on impaired loans
Average Recorded Investment	2,714	318
Interest Income Recognized	39	2
Lease financing
Investment and interest income recognized on impaired loans
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Real estate – construction
Investment and interest income recognized on impaired loans
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Real estate – 1-4 family mortgage
Investment and interest income recognized on impaired loans
Average Recorded Investment	11,088	14,442
Interest Income Recognized	26	81
Real estate – commercial mortgage
Investment and interest income recognized on impaired loans
Average Recorded Investment	15,314	15,031
Interest Income Recognized	106	122
Installment loans to individuals
Investment and interest income recognized on impaired loans
Average Recorded Investment	118	67
Interest Income Recognized	$ 0	$ 1