Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense

The following summarizes the components of income tax expense:

	Years ended December 31,
(in thousands)	2015			2014			2013
Current taxes:
U.S. Federal	$	5,890		$	5,757		$	78
U.S. State and local	2,215			2,158			1,127
International	33			(21		)	(221		)
Total current taxes	8,138			7,894			984
Deferred taxes:
U.S. Federal	2,702			4,725			14,394
U.S. State and local	585			(1,329		)	(694		)
International	(122		)	(346		)	173
Total deferred taxes	3,165			3,050			13,873
Total income tax provision	$	11,303		$	10,944		$	14,857

Schedule of Income Before Provision for Income Taxes

The following summarizes the components of income before provision for income taxes:

	Years ended December 31,
(in thousands)	2015			2014			2013
U.S.	$	37,523		$	39,638		$	48,137
International	(571		)	(404		)	(2,808		)
Income before provision for income taxes	$	36,952		$	39,234		$	45,329

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation between the effect of applying the federal statutory rate and the effective income tax rate used to calculate our income tax provision is as follows:

	Years ended December 31,
	2015		2014		2013
Federal statutory rate	35.0	%	35.0	%	35.0	%
Effect of:
State income taxes, net of federal benefit	5.7		3.2		5.2
Change in state income tax rate applied to deferred tax balances	2.1		(1.1	)	(2.5	)
Fixed assets	(0.1	)	(0.3	)	(1.0	)
Unrecognized tax benefit	(1.1	)	(2.9	)	0.3
State credits, net of federal benefit	6.0		(1.0	)	(2.9	)
Change in valuation reserve	(8.6	)	1.3		0.7
Federal credits generated	(6.1	)	(4.7	)	(5.1	)
Foreign tax rate	(0.7	)	(0.1	)	0.6
Acquisition costs	0.1		0.6		—
Section 162(m) limitation	0.1		0.4		1.8
Loss from sale of foreign subsidiary	1.9		—		—
Domestic production activities deduction	(1.8	)	(1.2	)	—
Other	(1.9	)	(1.3	)	0.7
Income tax provision effective rate	30.6	%	27.9	%	32.8	%

Schedule of Deferred Tax Assets and Liabilities

The significant components of our deferred tax assets and liabilities were as follows:

	December 31,
(in thousands)	2015			2014
Deferred tax assets relating to:
Federal and state and foreign net operating loss carryforwards	$	13,913		$	15,428
Federal, state and foreign tax credits	10,464			14,792
Intangible assets	449			562
Stock-based compensation	7,848			4,072
Accrued bonuses	9,335			7,177
Deferred revenue	6,049			7,332
Allowance for doubtful accounts	780			1,655
Other	6,593			5,790
Total deferred tax assets	55,431			56,808
Deferred tax liabilities relating to:
Intangible assets	(49,559		)	(54,794		)
Fixed assets	(10,323		)	(10,715		)
Other	(12,765		)	(7,593		)
Total deferred tax liabilities	(72,647		)	(73,102		)
Valuation allowance	(7,911		)	(11,161		)
Net deferred tax liability	$	(25,127	)	$	(27,455	)

Summary of Changes in Deferred Tax Asset Valuation Allowance

The following table illustrates the change in our deferred tax asset valuation allowance:

(in thousands)	Balance at beginning of year		Acquisition related change		Charges to expense			Balance at end of year
Year ended December 31,
2015	$	11,161	$	—	$	(3,250	)	$	7,911
2014	11,042		—		119			11,161
2013	10,651		635		(244		)	11,042

Summary of Changes in Unrecognized Tax Benefits

The following table sets forth the change to our unrecognized tax benefit for the years ended December 31, 2015, 2014 and 2013:

	Years ended December 31,
(in thousands)	2015			2014			2013
Balance at beginning of year	$	3,564		$	3,698		$	3,846
Increases from prior period positions	129			195			1,254
Decreases in prior year positions	(651		)	(102		)	(813		)
Increases from current period positions	257			1,046			224
Settlements (payments)	(274		)	—			—
Lapse of statute of limitations	(1		)	(1,273		)	(813		)
Balance at end of year	$	3,024		$	3,564		$	3,698