Loans - Average Recorded Investment in Impaired Loans by Class of Loans and Interest Recognized on Impaired Loans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Average recorded investment in impaired loans by class of loans and interest recognized on impaired loans
Average Recorded Investment	$ 53,028	$ 51,868
Interest Income	806	778
Owner Occupied [Member]
Average recorded investment in impaired loans by class of loans and interest recognized on impaired loans
Average Recorded Investment	19,227	23,006
Interest Income	14	434
Non Owner Occupied [Member]
Average recorded investment in impaired loans by class of loans and interest recognized on impaired loans
Average Recorded Investment	3,068	4,742
Interest Income	251	275
Commercial [Member]
Average recorded investment in impaired loans by class of loans and interest recognized on impaired loans
Average Recorded Investment	1,127	2,219
Interest Income
Residential [Member]
Average recorded investment in impaired loans by class of loans and interest recognized on impaired loans
Average Recorded Investment	1,574	1,745
Interest Income	37
Multifamily [Member]
Average recorded investment in impaired loans by class of loans and interest recognized on impaired loans
Average Recorded Investment	3,202	1,788
Interest Income	72	69
1-4 family [Member]
Average recorded investment in impaired loans by class of loans and interest recognized on impaired loans
Average Recorded Investment	12,544	6,208
Interest Income
Home Equity [Member]
Average recorded investment in impaired loans by class of loans and interest recognized on impaired loans
Average Recorded Investment	828	1,508
Interest Income	1
Commercial & Industrial [Member]
Average recorded investment in impaired loans by class of loans and interest recognized on impaired loans
Average Recorded Investment	11,458	10,588
Interest Income	431
Lease Financing & Other [Member]
Average recorded investment in impaired loans by class of loans and interest recognized on impaired loans
Average Recorded Investment		64
Interest Income