Annual report pursuant to Section 13 and 15(d)

Income Taxes - Significant Components of Company's Deferred Tax Assets and Liabilities (Detail)

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Income Taxes - Significant Components of Company's Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Deferred Tax Assets:    
Goodwill and intangible assets $ 1,261 $ 2,470
Asset reserves 6,589 4,497
Deferred compensation 7,986 8,895
Capital lease basis difference 1,753 1,935
State investment tax credit carryforwards, net of Federal tax 533 1,028
Customer advanced payments and deferred revenue 1,722 1,795
State net operating loss carryforwards and other 2,401 2,853
Total gross deferred tax assets 22,245 23,473
Valuation allowance for State and Foreign deferred tax assets and tax credit carryforwards, net of Federal tax (2,640) (3,134)
Deferred tax assets 19,605 20,339
Deferred Tax Liabilities:    
Depreciation 12,561 8,586
Intangible assets 19,254 23,693
Other 1,199 1,237
Deferred tax liabilities 33,014 33,516
Net deferred tax liabilities $ (13,409) $ (13,177)