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Income Taxes - Significant Components of Deferred Income Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Current deferred tax asset (liability): |  |
Accounts receivable allowance for doubtful accounts | $ 3,870 | $ 3,321
State taxes | (234) | (741)
Estimated litigation loss and regulatory reserves | 16 | 1,588
Other | 1,507 | 1,313
Current deferred tax asset | 5,159 | 5,481
Non-current deferred tax asset (liability): |  |
Depreciation and leases | (24,711) | (21,774)
Share-based compensation | 7,987 | 8,294
Deferred rent | 2,290 | 2,642
Intangibles | 2,504 | 3,384
Other | 98 | 409
Non-current deferred tax liability | (11,832) | (7,045)
Net deferred tax liability | $ (6,673) | $ (1,564)

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