Retirement Plans - Schedule of Changes in Benefit Obligations and Plan Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Service cost	$ 0	$ 0	$ 0
Interest cost	62	75	86
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Funded Status at End of Year	1,644	1,986
Unrecognized transition obligation	0	0
Unrecognized net gain	430	212
Amounts recognized in retained earnings	2,074	2,198
Change in Benefit Obligation [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	1,986	1,892
Service cost	0	0
Interest cost	62	75
Amendments	0	0
Actuarial gain	(225)	269
Net benefits paid	(179)	(250)
Benefit obligation at end of year	1,644	1,986
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net benefits paid	(179)	(250)
Change in Plan Assets [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Net benefits paid	(179)	(250)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	179	250
Net benefits paid	(179)	(250)
Fair value of plan assets at end of year	$ 0	$ 0