Notes Payable and Other Noncurrent Liabilities - Notes Payable (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Line of Credit Facility [Line Items]
Notes payable	$ 93,100	$ 99,701
Less: Current portion	6,607	6,601
Notes Payable, Non-current	86,493	93,100
Notes Payable through December 2019 [Member]
Line of Credit Facility [Line Items]
Notes payable	92,573	99,098
Gift Annuities Extending through 2019 [Member]
Line of Credit Facility [Line Items]
Notes payable	527	602
Notes Payable through March 2013 [Member]
Line of Credit Facility [Line Items]
Notes payable		$ 1