Acquired Loans Part 3 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 16, 2012
Change in accretable difference on acquired loans [Abstract]
Accretable yield, beginning	$ (17,653)	[1]	$ 17,056
Additions due to acquisition	(17,056)	[2]
Accretion to interest income	2,459	[3]
Disposals	323
Reclassification to / (from) nonaccretable difference	0
Accretable yield, ending	$ (31,927)		$ 17,056

[1] Accretable yield at January 1, 2012, includes $777 thousand of accretable yield for noncovered loans acquired from Heritage and accounted for under FASB ASC Topic 310-30.

[2] Accretable yield on loans acquired from Bay Bank on March 16, 2012.

[3] Accretion to interest income for Bay Bank since acquisition at March, 16, 2012 is considered immaterial.