Mortgage Servicing Rights (Detail) (Mortgage Servicing Rights, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Mortgage Servicing Rights
Servicing Asset at Amortized Cost [Line Items]
Balance at beginning of period	$ 13,535	$ 1,739
Additions	5,140	910
Prepayments	(209)	(68)
Changes in fair value resulting from valuation inputs or assumptions	462	25
Other-loans paid off	(375)	(27)
Balance at end of period	$ 18,553	$ 2,579