- Definition

The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period).

+ References+ Details

Retirement Plans - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Employee service period under ESOP	1 year		1 year
Contribution and paid out as benefits	$ 125,000	$ 151,000	$ 444,000	$ 411,000
Deferred compensation obligations	6,718,000		6,718,000		7,357,000
Earnings credits on deferred balances included in noninterest expense	124,000	135,000	415,000	429,000
Salaries And Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expenses related to ESOP	382,000	355,000	1,142,000	1,047,000
401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum age for employees			21 years
Minimum period for employees to participate			90 days
Supplemental Retirement Plans [Member] \| December 31, 2014 [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution and paid out as benefits			569,000
Employee Stock Ownership Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution and paid out as benefits	$ 366,000	$ 0	$ 926,806	$ 961,695