Loans - Recorded Investments in Non-Accrual Loans and Loans Past Due 90 Days and Still Accruing by Class of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual	$ 23,489	$ 34,808	$ 29,892
Past Due 90 Days and Still Accruing
Owner Occupied [Member]
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual	3,768	15,670
Past Due 90 Days and Still Accruing
Non Owner Occupied [Member]
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual	2,861	2,717
Past Due 90 Days and Still Accruing
Commercial [Member]
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual	879	2,478
Past Due 90 Days and Still Accruing
Residential [Member]
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual		2,242
Past Due 90 Days and Still Accruing
Multifamily [Member]
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual	1,282
Past Due 90 Days and Still Accruing
1-4 family [Member]
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual	12,164	8,470
Past Due 90 Days and Still Accruing
Home Equity [Member]
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual	1,113	1,212
Past Due 90 Days and Still Accruing
Commercial & Industrial [Member]
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual	1,422	2,019
Past Due 90 Days and Still Accruing
Lease Financing & Other [Member]
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual
Past Due 90 Days and Still Accruing
Overdrafts [Member]
Recorded investments in non-accrual loans and loans past due ninety days and still accruing by class of loans
Non-Accrual
Past Due 90 Days and Still Accruing