Business combinations

6 Months Ended

Jun. 30, 2014

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

Business Combinations

On April 1, 2013, the Company completed its acquisition of West Coast. The Company paid $540.8 million in total consideration to acquire 100% of the voting equity interests of West Coast. The primary reason for the acquisition was to expand the Company’s geographic footprint consistent with its ongoing growth strategy. The fair value of the net assets acquired totaled $312.4 million, including $1.88 billion of deposits, $1.41 billion of loans and $15.3 million of other intangible assets. Goodwill of $228.4 million was recorded as part of the acquisition. The goodwill is not deductible for income tax purposes.

The operating results of the Company include the operating results produced by the acquired assets and assumed liabilities for the period April 1, 2013 to June 30, 2014. Disclosure of the amount of West Coast’s revenue and net income (excluding integration costs) included in Columbia’s consolidated income statement is impracticable due to the integration of the operations and accounting for this acquisition.

The following table presents certain unaudited pro forma information for the six month period ended June 30, 2013, for illustrative purposes only. This unaudited pro forma information was calculated as if West Coast had been acquired as of the beginning of the year prior to the acquisition. 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 as of the beginning of the year prior to the acquisition. 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 investment securities been recorded at fair value as of the beginning of the year prior to the acquisition. 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 would have differed from the unaudited pro forma information presented.

	Unaudited Pro Forma
	Six Months Ended June 30,
	2013
	(in thousands)
Total revenues (net interest income plus noninterest income)	$	177,970
Net income	$	43,256
Earnings per share - basic	$	0.85
Earnings per share - diluted	$	0.83

In connection with the West Coast acquisition, Columbia recognized $672 thousand and $9.2 million of acquisition-related expenses for the three month periods ended June 30, 2014 and 2013, respectively, and $1.6 million and $10.0 million for the six month periods ended June 30, 2014 and 2013, respectively.

See Note 2, Business Combinations, in Item 8 of our 2013 Form 10-K for additional details related to the West Coast acquisition.