Income Tax (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Income Tax Provision (Benefit) on Income from Operations

The income tax provision (benefit) on income from operations consists of the following:

	Years ended December 31,
	2015			2014			2013
Current:
Federal	$	44,841		$	34,504		$	25,625
State		6,670			4,827			2,590
		51,511			39,331			28,215
Deferred		(7,956	)		(3,804	)		(1,497	)
	$	43,555		$	35,527		$	26,718

Reconciliation of U.S. Statutory Income Tax Rate to Effective Income Tax Expense Rate

Reconciliation of the U.S. statutory income tax rate to our effective income tax expense rate for operations follows:

	Years ended December 31,
	2015			2014			2013
Federal income tax expense at statutory rate	$	37,949		$	33,064		$	23,037
State income tax, net of federal income tax benefit		3,715			2,867			2,371
Non-deductible business expenses		2,414			1,485			1,110
Qualified manufacturing activities		(466	)		(1,720	)		—
Other, net		(57	)		(169	)		200
	$	43,555		$	35,527		$	26,718

Schedule of Deferred Tax Assets and Liabilities

The tax effects of the major items recorded as deferred tax assets and liabilities as of December 31 are:

	2015			2014
Deferred income tax assets:
Operating expenses not currently deductible	$	9,953		$	9,093
Stock option and other employee benefit plans		13,504			9,815
Capital loss and credit carryforward		179			177
Property and equipment		—			46
Total deferred income tax assets		23,636			19,131
Deferred income tax liabilities:
Intangible assets		(111,653	)		(13,424	)
Property and equipment		(2,781	)		—
Other		(228	)		(203	)
Total deferred income tax liabilities		(114,662	)		(13,627	)
Net deferred income tax (liability) asset	$	(91,026	)	$	5,504