INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2015

Income before income taxes consisted of the following components:



	Year ended December 31,
	2015			2014		2013
	(in thousands)
Domestic	$	365,362		$	373,122	$	389,459
Foreign	(23,191		)	19,682		18,010
Total income before income taxes	$	342,171		$	392,804	$	407,469

Summary of Income Tax Expense (Benefit)

Income tax expense consisted of the following components:



	Year ended December 31
	2015			2014			2013
	(in thousands)
Current:
Federal	$	104,711		$	120,086		$	120,137
State	13,414			16,968			15,433
Foreign	4,297			6,296			8,656
Total current income tax expense	122,422			143,350			144,226
Deferred:
Federal	3,193			(3,785		)	(363		)
State	(1,412		)	1,042			(955		)
Foreign	(1,331		)	(3,675		)	(460		)
Total deferred income tax expense (benefit)	450			(6,418		)	(1,778		)
Total income tax expense	$	122,872		$	136,932		$	142,448

Summary of Differences Between the Company's Effective Tax Rate and the Federal Statutory Tax Rate

The following table summarizes the differences between the Company's effective tax rate for financial reporting purposes and the federal statutory tax rate:



	Year ended December 31,
	2015		2014		2013
Percent of pretax earnings:
Statutory federal tax rate	35.0	%	35.0	%	35.0	%
Increase (reduction) resulting from:
State income tax, net of federal tax benefit	3.5	%	3.2	%	3.1	%
Other permanent differences	0.4	%	0.1	%	0.1	%
International operations, net of foreign tax credits	3.8	%	(0.5	)%	—	%
Worthless stock tax benefit	(3.4	)%	—	%	—	%
Federal tax credits and income deductions	(2.5	)%	(2.3	)%	(2.1	)%
Tax impact of uncertain tax positions and other	(0.9	)%	(0.6	)%	(1.1	)%
Effective income tax rate	35.9	%	34.9	%	35.0	%

Summary of Significant Components of the Company's Deferred Tax Assets and Liabilities

Significant components of the Company's deferred tax assets and liabilities consisted of the following at December 31:



	2015									2014
	Assets			Liabilities			Net			Assets			Liabilities			Net
	(in thousands)
Current assets (liabilities):
Operating reserves	$	7,159		$	—		$	7,159		$	5,971		$	—		$	5,971
Deferred revenue	2,976			—			2,976			2,697			—			2,697
Prepaid expenses	—			(3,936		)	(3,936		)	—			(5,282		)	(5,282		)
Accrued workers' compensation	2,891			—			2,891			2,811			—			2,811
Other	1,826			—			1,826			1,425			—			1,425
Total current	$	14,852		$	(3,936	)	$	10,916		$	12,904		$	(5,282	)	$	7,622
Non-current assets (liabilities):
Intangibles	$	—		$	(331,157	)	$	(331,157	)	$	—		$	(327,675	)	$	(327,675	)
Fixed assets	16,900			—			16,900			17,631			—			17,631
Stock compensation	3,344			—			3,344			1,977			—			1,977
Net operating loss and credit carryforwards	11,825			—			11,825			9,421			—			9,421
Long-term rent liabilities	8,438			—			8,438			7,836			—			7,836
Deferred Revenue	3,775			—			3,775			5,070			—			5,070
Convertible senior notes	—			(16,599		)	(16,599		)	—			—			—
Other	5,256			—			5,256			7,121			—			7,121
Valuation allowance	(2,915		)	—			(2,915		)	(1,144		)	—			(1,144		)
Total non-current	$	46,623		$	(347,756	)	$	(301,133	)	$	47,912		$	(327,675	)	$	(279,763	)
Total net deferred taxes	$	61,475		$	(351,692	)	$	(290,217	)	$	60,816		$	(332,957	)	$	(272,141	)

Summary of Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:



	December 31,
	2015			2014			2013
	(in thousands)
Balance of unrecognized tax benefits at beginning of period	$	11,652		$	10,848		$	12,882
Additions for tax positions taken during current period	1,345			1,524			873
Additions for tax positions taken during prior periods	543			116			1,965
Reductions for tax positions taken during prior periods	(6,258		)	(527		)	(4,068		)
Settlements	—			(309		)	(804		)
Balance of unrecognized tax benefits at end of period	$	7,282		$	11,652		$	10,848