Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Components Of Income Tax Expense Benefit Continuing Operations [Abstract]

Provision For Income Taxes/(Benefit)

The provision for income taxes consists of the following (in thousands): 

	Year Ended December 31,
	2018		2017			2016
Current taxes:
Federal	$	89,971	$	(29,396	)	$	7,927
State		36,070		(334	)		5,818
Foreign		99		(1,734	)		1,255
		126,140		(31,464	)		15,000
Deferred taxes:
Federal		11,932		114,842			39,127
State		2,267		1,728			6,261
Foreign		55		1,559			674
		14,254		118,129			46,062
Provision for income taxes	$	140,394	$	86,665		$	61,062

Reconciliation Of The Statutory Federal Income Tax With The Company's Effective Tax Rate

Reconciliation of the statutory federal income tax rate with our company’s effective income tax rate is as follows (in thousands): 

	Year Ended December 31,
	2018			2017			2016
Statutory rate	$	112,215		$	94,338		$	49,904
State income taxes, net of federal income tax		30,762			6,721			7,688
Foreign tax rate difference		(318	)		(412	)		(1,810	)
Change in uncertain tax position		(617	)		1,544			41
Revaluation of deferred tax assets		(3,006	)		42,443			—
Excess tax benefit from stock-based compensation		(3,700	)		(57,431	)		—
Non-deductible litigation expense		—			—			7,700
Other, net		5,058			(538	)		(2,461	)
	$	140,394		$	86,665		$	61,062

Deferred Tax Assets And Liabilities

Tax effect of temporary differences and carryforwards that comprise significant portions of deferred tax assets and liabilities (in thousands): 

	December 31,
	2018			2017
Deferred tax assets:
Deferred compensation	$	74,916		$	71,687
Receivable reserves		30,252			22,679
Net operating loss carryforwards		29,699			31,986
Accrued expenses		19,832			33,957
Unrealized loss on investments		10,635			—
Depreciation		—			4,012
Other		3,066			—
Total deferred tax assets		168,400			164,321
Valuation allowance		(3,944	)		(4,285	)
		164,456			160,036
Deferred tax liabilities:
Goodwill and other intangibles		(42,045	)		(38,982	)
Depreciation		(6,629	)		—
Prepaid expenses		(3,774	)		(2,834	)
Unrealized gain on investments		—			(11,081	)
Other		—			(1,987	)
		(52,448	)		(54,884	)
Net deferred tax asset	$	112,008		$	105,152

Unrecognized Tax Benefits

The following table summarizes the activity related to our company’s unrecognized tax benefits from January 1, 2016 to December 31, 2018 (in thousands): 

	Year Ended December 31,
	2018			2017			2016
Beginning balance	$	3,180		$	1,800		$	2,717
Increase related to prior year tax positions		4			3,036			5
Decrease related to prior year tax positions		(33	)		(287	)		(31	)
Increase related to current year tax positions		191			—			—
Decrease related to settlements with taxing authorities		(3,030	)		(171	)		(42	)
Decrease related to lapsing of statute of limitations		—			(1,198	)		—
Increase/(decrease) related to business acquisitions		—			—			(849	)
Ending balance	$	312		$	3,180		$	1,800