Income Taxes (Significant Components of Deferred Taxes) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Excess tax basis of acquired loans over carrying value	$ 5,437	$ 10,408
Allowance for loan losses	4,767	5,917
Intangible assets	18,681	20,855
Other real estate owned	2,088	1,788
Accrued stock-based compensation	13,734	11,965
Accrued compensation	1,056	96
Capitalized start-up costs	6,098	6,568
Accrued expenses	1,851	240
Net deferred loan fees	832	0
Net unrealized losses on investment securities	4,154	0
Other	283	46
Total deferred tax assets	58,981	57,883
Deferred tax liabilities:
FDIC indemnification asset net of clawback liability	(14,486)	(19,006)
Net unrealized gains on investment securities	0	(25,705)
Premises and equipment	(6,437)	(6,268)
Prepaid expenses	(569)	(691)
Other	(15)	(192)
Total deferred tax liabilities	(21,507)	(51,862)
Net deferred tax asset (liability)	$ 37,474	$ 6,021