Purchased Loans (Details 7) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	$ 6,192,882	$ 6,159,972
Purchased loans | Receivables Acquired with Deteriorated Credit Quality
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	255,739	271,758
Purchased loans | Receivables Acquired with Deteriorated Credit Quality | Commercial, financial, agricultural
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	13,028	11,994
Purchased loans | Receivables Acquired with Deteriorated Credit Quality | Lease financing
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	0	0
Purchased loans | Receivables Acquired with Deteriorated Credit Quality | Real estate – construction
Loans acquired with deteriorated credit quality
Total Purchased Credit Deteriorated Loans	0	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	68,065	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	172,719	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	$ 1,927	$ 1,985