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Loans - Summary of Related Party Loans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Outstanding at beginning of year	$ 208,243
New loans and advances	41,483
Repayments	(17,426)
Outstanding at end of year	$ 232,300

For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

Reflects the amount of new advances made to related parties in the form of loan and lease receivables.

Reflects the amount of collections received from related parties to reduce the carrying amounts of loans and leases receivable due from them.