Acquired Loans Part 2 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2012		Dec. 31, 2011
Carrying Value of Acquired Loans [Abstract]
Carrying value, beginning	$ 76,302
Accretion to interest income	2,459	[1]
Carrying value, ending	174,315
Acquired Impaired [Member] | Covered Loans [Member]
Carrying Value of Acquired Loans [Abstract]
Carrying value, beginning	72,131		0
Loans acquired	0	[2]	93,940
Accretion to interest income	2,311	[3]	4,347
Payments received, net	(4,606)		(25,764)	[4]
Other	56		110
Less allowance for loan losses, acquired loans	(234)		(502)
Carrying value, ending	69,658		72,131
Acquired Impaired [Member] | Noncovered Loans [Member]
Carrying Value of Acquired Loans [Abstract]
Carrying value, beginning	4,350	[5]	0	[5]
Loans acquired	92,312	[2],[5]	9,468	[5]
Accretion to interest income	148	[3],[5]	349	[5]
Payments received, net	(1,990)	[5]	(5,076)	[4],[5]
Other	186	[5]	(391)	[5]
Less allowance for loan losses, acquired loans	(37)	[5]	0	[5]
Carrying value, ending	94,969	[5]	4,350	[5]
Acquired Nonimpaired [Member] | Covered Loans [Member]
Carrying Value of Acquired Loans [Abstract]
Carrying value, beginning	4,171	[6]	0	[6]
Loans acquired	0	[2],[6]	3,830	[6]
Accretion to interest income	59	[3],[6]	543	[6]
Payments received, net	(238)	[6]	(202)	[4],[6]
Other	33	[6]	0	[6]
Less allowance for loan losses, acquired loans	0	[6]	0	[6]
Carrying value, ending	4,025	[6]	4,171	[6]
Acquired Nonimpaired [Member] | Noncovered Loans [Member]
Carrying Value of Acquired Loans [Abstract]
Carrying value, beginning	13	[5],[6]	0	[5],[6]
Loans acquired	5,741	[2],[5],[6]	176	[5],[6]
Accretion to interest income	0	[3],[5],[6]	4	[5],[6]
Payments received, net	(332)	[5],[6]	(47)	[4],[5],[6]
Other	241	[5],[6]	(120)	[5],[6]
Less allowance for loan losses, acquired loans	0	[5],[6]	0	[5],[6]
Carrying value, ending	$ 5,663	[5],[6]	$ 13	[5],[6]

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

[2] Fair value of 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.

[4] Includes $4.3 million for loan recoveries and an adjustment to payments recorded for covered acquired impaired loans, which was reported as "Changes in expected cash flows" at December 31, 2011.

[5] Acquired noncovered loans were included in LFHI at December 31, 2011.

[6] Acquired nonimpaired loans consist of revolving credit agreements that are not in scope for FASB ASC Topic 310-30.