Non Purchased Loans - Investment and Interest Income Recognized on Impaired Loans (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Investment and interest income recognized on impaired loans
Average Recorded Investment	$ 10,166
Interest Income Recognized	57
Non purchased loans and leases
Investment and interest income recognized on impaired loans
Average Recorded Investment	28,875
Interest Income Recognized	192
Non purchased loans and leases | Commercial, financial, agricultural
Investment and interest income recognized on impaired loans
Average Recorded Investment	4,634
Interest Income Recognized	10
Non purchased loans and leases | Lease financing
Investment and interest income recognized on impaired loans
Average Recorded Investment	87
Interest Income Recognized	0
Non purchased loans and leases | Real estate – construction:
Investment and interest income recognized on impaired loans
Average Recorded Investment	8,485
Interest Income Recognized	102
Non purchased loans and leases | Real estate – 1-4 family mortgage
Investment and interest income recognized on impaired loans
Average Recorded Investment	8,490
Interest Income Recognized	51
Non purchased loans and leases | Real estate – commercial mortgage:
Investment and interest income recognized on impaired loans
Average Recorded Investment	7,030
Interest Income Recognized	28
Non purchased loans and leases | Installment loans to individuals
Investment and interest income recognized on impaired loans
Average Recorded Investment	149
Interest Income Recognized	$ 1