

	As of December 31,
(in thousands)	2019			2018
Deferred tax assets:
Tax loss carryforwards	$	34,357		$	30,689
Share-based compensation	7,366			7,395
Accrued expenses	19,048			17,242
Property and equipment	8,602			16,377
Goodwill and intangible amortization	8,143			10,619
Intercompany notes	5,977			6,913
Accrued revenue	24,721			36,273
Tax credits	65,063			—
Lease accounting	89,965			—
Other	15,379			11,876
Gross deferred tax assets	278,621			137,384
Valuation allowance	(83,184		)	(21,857		)
Net deferred tax assets	195,437			115,527
Deferred tax liabilities:
Intangible assets related to purchase accounting	(16,379		)	(22,877		)
Goodwill and intangible amortization	(20,806		)	(16,115		)
Accrued expenses	(29,084		)	(28,274		)
Intercompany notes	(10,498		)	(14,034		)
Accrued interest	(27,902		)	(32,372		)
Capitalized research and development	(6,048		)	(8,299		)
Property and equipment	(15,467		)	(8,408		)
Accrued revenue	(4,727		)	(4,388		)
Lease accounting	(89,965		)	—
Other	(8,997		)	(5,841		)
Total deferred tax liabilities	(229,873		)	(140,608		)
Net deferred tax liabilities	$	(34,436	)	$	(25,081	)

Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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