Long-Term Debt - Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Subordinated notes payable	$ 98,011	$ 150,000
Term note payable	220,000	140,000
Other long-term debt	78,578	63,890
Total long-term debt	$ 396,589	$ 353,890