Acquired Loans Part 3 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Feb. 15, 2013
Change in accretable difference on acquired loans [Abstract]
Accretable yield, beginning	$ (26,383)		$ (86,221)
Additions due to acquisition	(86,221)	[1]
Accretion to interest income	7,816	[2]
Disposals	1,575
Reclassification to / (from) nonaccretable difference	(2,556)
Accretable yield, ending	$ (105,769)		$ (86,221)

[1] Accretable yield on loans acquired from BancTrust on February 15, 2013.

[2] Accretion to interest income for BancTrust since acquisition at February 15, 2013 is considered immaterial.