Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets
Share-based compensation	$ 6,654	$ 5,638
Accrued incentive compensation	7,278	16,259
Accruals and reserves	2,961	1,762
Net operating loss and tax credit carryforwards	8,438	10,232
Deferred compensation plan	7,840	6,935
Deferred revenue	4,683	5,946
Goodwill and intangibles	2,084
Operating leases and lease incentives	25,074	25,672
Total deferred tax assets	65,012	72,444
Valuation allowance	(6,573)	(6,510)
Total deferred tax assets, net of valuation allowance	58,439	65,934
Deferred tax liabilities
Deferred incentive compensation	7,267	5,700
Depreciation	11,767	12,795
Goodwill and intangibles	46,974	56,590
Other	2,139	2,227
Total deferred tax liabilities	68,147	77,312
Net deferred tax liabilities	$ 9,708	$ 11,378