Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Bad debt reserve	$ 13	$ 26
Vacation accrual	1,020	909
Nonqualified stock options	1,526	1,767
Deferred finance costs	0	3,082
Debt issuance costs	848	0
Acquisition costs	158	197
State tax deferral	1,474	1,373
Deferred revenue	352	91
State tax credits	290	566
Net operating loss	47	0
Estimated liability for appeals	4,277	1,260
Other	118	82
Total deferred tax assets	10,123	9,353
Valuation allowance	(147)	(351)
Total deferred tax assets net of valuation allowance	9,976	9,002
Deferred tax liabilities:
Identifiable intangible assets	(11,176)	(13,007)
Fixed assets	(4,543)	(3,446)
Other	(22)	(22)
Total deferred tax liabilities	(15,741)	(16,475)
Net deferred tax liabilities	$ (5,765)	$ (7,473)