Non Purchased Loans - Investment and Interest Income Recognized on Impaired Loans (Details) - Non purchased loans and leases - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Investment and interest income recognized on impaired loans
Average Recorded Investment	$ 28,875	$ 17,618
Interest Income Recognized	192	189
Commercial, financial, agricultural
Investment and interest income recognized on impaired loans
Average Recorded Investment	4,634	2,338
Interest Income Recognized	10	11
Lease financing
Investment and interest income recognized on impaired loans
Average Recorded Investment	87	159
Interest Income Recognized	0	0
Real estate – construction
Investment and interest income recognized on impaired loans
Average Recorded Investment	8,485	150
Interest Income Recognized	102	18
Real estate – 1-4 family mortgage
Investment and interest income recognized on impaired loans
Average Recorded Investment	8,490	8,197
Interest Income Recognized	51	67
Real estate – commercial mortgage
Investment and interest income recognized on impaired loans
Average Recorded Investment	7,030	6,670
Interest Income Recognized	28	92
Installment loans to individuals
Investment and interest income recognized on impaired loans
Average Recorded Investment	149	104
Interest Income Recognized	$ 1	$ 1