Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Income Taxes [Line Items]
Gross Deferred Tax Assets	$ 48,729	$ 43,388
Net Deferred Tax Asset	34,749	$ 28,686
Change in deferred tax assets, net	$ 6,100
Statutory tax rate	35.00%	35.00%	35.00%
Valuation allowance related to gross deferred tax assets	$ 2,670	$ 2,249
Deferred tax assets operating loss carry forwards, total	26,700
Decrease to eliminate unrecognized tax benefit related to bad debts	0	$ 1,673	$ 0
Unrecognized tax benefits, accrued interest	$ 100		300
Unrecognized tax benefits, interest expense			$ 200
Minimum
Schedule Of Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards, expiration date	2020
Maximum
Schedule Of Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards, expiration date	2035
PENNSYLVANIA
Schedule Of Income Taxes [Line Items]
Valuation allowance related to gross deferred tax assets	$ 2,700
Integrity Bancshares, Inc.
Schedule Of Income Taxes [Line Items]
Gross Deferred Tax Assets	12,600
Net Deferred Tax Asset	$ 4,200