Income Taxes - Schedule of Income Tax Expense in Consolidated Statements of Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Current	$ 5,742	$ 4,760	$ 2,506
Use of operating loss carryforward			2,958
Deferred	3,543	2,525	5,092
Applicable income tax expense	$ 9,285	$ 7,285	$ 10,556