Business Combinations (Pro Forma Results of Operations) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net interest income	$ 93,893		$ 101,012		$ 188,082		$ 203,367
Provision for non-covered loan and lease losses	2,993		6,638		9,981		9,805
(RECAPTURE OF) PROVISION FOR COVERED LOAN AND LEASE LOSSES	(3,072)		1,406		(2,840)		1,375
Non-interest income	34,497		28,926		68,512		56,163
Non-interest expense	87,931		86,936		173,693		174,632
Income before income taxes	40,538		34,958		75,760		73,718
Provision for income taxes	14,285		11,681		26,146		24,938
Net income	26,253		23,277		49,614		48,780		101,891
Dividends and undistributed earnings allocated to participating securities	197	[1]	162	[1]	380	[1]	329	[1]
Net earnings available to common shareholders	26,056		23,115		49,234		48,451
Earnings per share:
Basic (in usd per share)	$ 0.23		$ 0.21		$ 0.44		$ 0.43
Diluted (in usd per share)	$ 0.23		$ 0.21		$ 0.44		$ 0.43
Average shares outstanding:
Basic (in shares)	111,954		111,897		111,946		111,943
Diluted (in shares)	112,145		112,078		112,133		112,120
Merger related expenses	810		153		2,341		253
Pro Forma [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net interest income	105,736		111,877		211,493		224,682
Provision for non-covered loan and lease losses	5,604		10,672		16,041		14,556
(RECAPTURE OF) PROVISION FOR COVERED LOAN AND LEASE LOSSES	(3,072)		1,406		(2,840)		1,375
Non-interest income	35,019		30,135		69,824		58,165
Non-interest expense	90,456		90,387		179,350		181,378
Income before income taxes	47,767		39,547		88,766		85,538
Provision for income taxes	16,979		13,377		31,071		29,406
Net income	30,788		26,170		57,695		56,132
Dividends and undistributed earnings allocated to participating securities	231		182		442		379
Net earnings available to common shareholders	30,557		25,988		57,253		55,753
Earnings per share:
Basic (in usd per share)	$ 0.27		$ 0.23		$ 0.51		$ 0.50
Diluted (in usd per share)	$ 0.27		$ 0.23		$ 0.51		$ 0.50
Average shares outstanding:
Basic (in shares)	111,954		111,897		111,946		111,943
Diluted (in shares)	112,145		112,078		112,133		112,120
Acquisition-related Costs [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net interest income	(100)	[2]	(806)	[2]	(464)	[2]	(1,790)	[2]
Provision for non-covered loan and lease losses	2,393	[3]	1,168	[3]	3,182	[3]	(1,324)	[3]
Non-interest income	0		0		0		0
Non-interest expense	(910)	[4]	(303)	[5]	(1,340)	[6]	(607)	[5]
Income before income taxes	(1,583)		(1,671)		(2,306)		141
Provision for income taxes	(633)	[7]	(668)	[7]	(923)	[7]	56	[7]
Net income	(950)		(1,003)		(1,383)		85
Dividends and undistributed earnings allocated to participating securities	34		20		62		50
Net earnings available to common shareholders	(984)		(1,023)		(1,445)		35
Average shares outstanding:
Income tax effect of pro forma adjustments	40.00%		40.00%		40.00%		40.00%
Financial Pacific Holding Corp [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net interest income	11,943	[8]	11,671	[9]	23,875	[10]	23,105	[11]
Provision for non-covered loan and lease losses	218	[8]	2,866	[9]	2,878	[10]	6,075	[11]
(RECAPTURE OF) PROVISION FOR COVERED LOAN AND LEASE LOSSES	0	[8]	0	[9]	0	[10]	0	[11]
Non-interest income	522	[8]	1,209	[9]	1,312	[10]	2,002	[11]
Non-interest expense	3,435	[8]	3,754	[9]	6,997	[10]	7,353	[11]
Income before income taxes	8,812	[8]	6,260	[9]	15,312	[10]	11,679	[11]
Provision for income taxes	3,327	[8]	2,364	[9]	5,848	[10]	4,412	[11]
Net income	5,485	[8]	3,896	[9]	9,464	[10]	7,267	[11]
Dividends and undistributed earnings allocated to participating securities	0	[8]	0	[9]	0	[10]	0	[11]
Net earnings available to common shareholders	5,485	[8]	3,896	[9]	9,464	[10]	7,267	[11]
Average shares outstanding:
Merger related expenses	$ 654				$ 796

[1] Represents dividends paid and undistributed earnings allocated to nonvested restricted stock awards.

[2] Consists of interest expense benefit of FinPac utilizing Bank funding, and change in yields due to fair value adjustments.

[3] Consists of adjustment to FinPac provision for credit losses due to purchase accounting adjustments.

[4] Consists of merger related expenses of $0.7 million at the Bank, additional expense related to restricted stock, and FinPac amortization of intangible assets, director compensation and travel, and management fees.

[5] Consists of additional expense related to restricted stock, and FinPac amortization of intangible assets, director compensation and travel, and management fees.

[6] Consists of merger related expenses of $0.8 million at the Bank, additional expense related to restricted stock, and FinPac amortization of intangible assets, director compensation and travel, and management fees.

[7] Income tax effect of pro forma adjustments at 40%.

[8] FinPac amounts represent results from April 1, 2013 to June 30, 2013. Acquisition date is July 1, 2013.

[9] FinPac amounts represent results from April 1, 2012 to June 30, 2012. Acquisition date is July 1, 2013.

[10] FinPac amounts represent results from January 1, 2013 to June 30, 2013. Acquisition date is July 1, 2013.

[11] FinPac amounts represent results from January 1, 2012 to June 30, 2012. Acquisition date is July 1, 2013.