DOCUMENT AND ENTITY INFORMATION	6 Months Ended
	Jun. 30, 2011
Entity Registrant Name	WEST COAST BANCORP /NEW/OR/
Entity Central Index Key	0000717059
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	wcbo
Entity Common Stock, Shares Outstanding	19,316,069
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2