Condensed Financial Statements Of Parent Company - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements of Parent Company
Cash on deposit at subsidiary bank	$ 69,333	$ 48,665
Other	19,842	18,041
TOTAL ASSETS	3,630,313	3,351,767	$ 3,062,166
Subordinated notes payable	59,111	59,031
Junior subordinated debentures	72,166	72,166
TOTAL LIABILITIES	3,328,003	3,078,231
Shareholders' equity	302,310	273,536	$ 308,769	$ 281,085
TOTAL LIABILITIES AND EQUITY	3,630,313	3,351,767
CoBiz Financial Inc.
Condensed Financial Statements of Parent Company
Cash on deposit at subsidiary bank	16,588	20,105
Investments in bank subsidiary	377,104	347,076
Investment in non-bank subsidiaries	25,792	26,500
Accounts receivable from bank subsidiary	7,916	7,048
Accounts receivable from non-bank subsidiaries	1,398	534
Other	17,350	14,248
TOTAL ASSETS	446,148	415,511
Accounts payable to bank subsidiaries	3,902	4,931
Accounts payable to non-bank subsidiaries	4,306	3,857
Subordinated notes payable	59,111	59,031
Junior subordinated debentures	72,166	72,166
Other liabilities	4,353	1,990
TOTAL LIABILITIES	143,838	141,975
Shareholders' equity	302,310	273,536
TOTAL LIABILITIES AND EQUITY	$ 446,148	$ 415,511