Business Combinations (Tables)

0 Months Ended

12 Months Ended

Apr. 02, 2013

Dec. 31, 2012

Bank of Whitman [Member]

Dec. 31, 2012

First Heritage Bank [Member]

Dec. 31, 2012

Summit Bank [Member]

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

The table below summarizes the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed:

	April 1, 2013
	(in thousands)
Purchase price as of April 1, 2013	$	540,791
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value:
Cash and cash equivalents	$	110,440
Investment securities	730,842
Federal Home Loan Bank stock	11,824
Acquired loans	1,407,798
Premises and equipment	35,884
Other real estate owned	14,708
Core deposit intangible	15,257
Other assets	75,820
Deposits	(1,883,407		)
Federal Home Loan Bank advances	(128,885		)
Junior subordinated debentures	(51,000		)
Other liabilities	(26,888		)
Total fair value of identifiable net assets	312,393
Goodwill	$	228,398

The table below displays the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed:

	August 5, 2011
	(in thousands)
Assets
Cash and due from banks	$	52,072
Investment securities	16,298
Federal Reserve Bank and Federal Home Loan Bank stock	3,977
Acquired loans	200,041
Accrued interest receivable	1,975
Premises and equipment	86
FDIC receivable	156,710
Core deposit intangible	3,943
Other assets	2,447
Total assets acquired	$	437,549
Liabilities
Deposits	$	401,127
Federal Home Loan Bank advances	32,949
Accrued interest payable	213
Deferred tax liability	1,034
Other liabilities	396
Total liabilities assumed	435,719
Net assets acquired (after tax gain)	$	1,830

The table below displays the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed:

	May 27, 2011
	(in thousands)
Assets
Cash and due from banks	$	4,688
Interest-earning deposits with banks	6,689
Investment securities	5,303
Federal Home Loan Bank stock	477
Acquired loans	81,488
Accrued interest receivable	476
Premises and equipment	5,339
FDIC receivable	4,751
Other real estate owned covered by loss sharing	8,225
Goodwill	4,023
Core deposit intangible	1,337
FDIC indemnification asset	38,531
Other assets	3,657
Total assets acquired	$	164,984
Liabilities
Deposits	$	159,525
Federal Home Loan Bank advances	5,003
Accrued interest payable	421
Other liabilities	35
Total liabilities assumed	$	164,984

The table below displays the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed:

	May 20, 2011
	(in thousands)
Assets
Cash and due from banks	$	1,837
Interest-earning deposits with banks and federal funds sold	14,198
Investment securities	871
Federal Home Loan Bank stock	406
Acquired loans	69,783
Accrued interest receivable	429
Premises and equipment	42
FDIC receivable	6,984
Other real estate owned covered by loss sharing	2,162
Goodwill	1,892
Core deposit intangible	509
FDIC indemnification asset	30,203
Other assets	1,813
Total assets acquired	$	131,129
Liabilities
Deposits	$	123,279
Federal Home Loan Bank advances	7,772
Accrued interest payable	71
Other liabilities	7
Total liabilities assumed	$	131,129

Business Acquisition, Pro Forma Information [Table Text Block]

The following table presents certain unaudited pro forma information for illustrative purposes only, for the years ended December 31, 2013 and 2012 as if West Coast had been acquired on January 1, 2012. The unaudited estimated pro forma information combines the historical results of West Coast with the Company's consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the acquisition occurred on January 1, 2012. In particular, no adjustments have been made to eliminate the impact of other-than-temporary impairment losses and losses recognized on the sale of securities that may not have been necessary had the investments securities been recorded at fair value as of January 1, 2012. The unaudited pro forma information does not consider any changes to the provision for credit losses resulting from recording loan assets at fair value. Additionally, Columbia expects to achieve further operating cost savings and other business synergies, including revenue growth, as a result of the acquisition which are not reflected in the pro forma amounts that follow. As a result, actual amounts will differ from the unaudited pro forma information presented.

	Unaudited Pro Forma
	Years Ended December 31,
	2013		2012
	(in thousands)
Total revenues (net interest income plus noninterest income)	$	337,712	$	420,167
Net income	$	76,496	$	91,261
Earnings per share - basic	$	1.50	$	1.79
Earnings per share - diluted	$	1.46	$	1.74