Employee Benefit Plans (Detail) - Components of Net Periodic Benefit Cost (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	$ 83	$ 146
Expected return on assets	(114)	(166)
Amortization of net actuarial gain	66	90
Settlement losses	52	228
Total	87	298
Post Retirement Benefit Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	127	192
Interest cost	165	209
Amortization of prior service cost	(647)	(227)
Prior service cost recognized due to curtailment	0	(79)
Amortization of net actuarial gain	28
Settlement losses	0
Total	$ (327)	$ 95