Parent Company Financial Information - Schedule of Parent Company Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Assets:
Cash deposited with the Bank	$ 28,607	$ 19,807
Total assets	1,373,487	1,270,232
Liabilities and shareholders' equity:
Liabilities	1,190,106	1,091,366
Junior subordinated debentures	8,248	8,248
Total shareholders' equity	183,381	178,866	172,238	165,662
Total liabilities and shareholders' equity	1,373,487	1,270,232
Pacific Continental Corporation [Member]
Assets:
Cash deposited with the Bank	2,465	7,273
Prepaid expenses	16	11
Equity in Trust	248	248
Investment in the Bank, at cost plus equity in earnings	188,935	179,618
Total assets	191,664	187,150
Liabilities and shareholders' equity:
Liabilities	35	36
Junior subordinated debentures	8,248	8,248
Total shareholders' equity	183,381	178,866
Total liabilities and shareholders' equity	$ 191,664	$ 187,150