Purchased Loans (Details 7) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	$ 6,326,858	$ 6,159,972
Purchased loans | Receivables Acquired with Deteriorated Credit Quality
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	236,796	271,758
Purchased loans | Receivables Acquired with Deteriorated Credit Quality | Commercial, financial, agricultural
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	12,006	11,994
Purchased loans | Receivables Acquired with Deteriorated Credit Quality | Real estate – construction
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans		840
Purchased loans | Receivables Acquired with Deteriorated Credit Quality | Real estate – 1-4 family mortgage
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	63,156	71,952
Purchased loans | Receivables Acquired with Deteriorated Credit Quality | Real estate – commercial mortgage
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	159,851	184,987
Purchased loans | Receivables Acquired with Deteriorated Credit Quality | Installment loans to individuals
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	$ 1,783	$ 1,985