Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Components of Provision for Income Taxes

The following table sets forth the components of the provision for income taxes in the periods indicated:

	Year Ended December 31,
	2014			2013			2012
Current income tax expense:
U.S. federal	$	(21,345	)	$	39,279		$	126,585
State and local		(227	)		4,611			22,004
Total	$	(21,572	)	$	43,890		$	148,589
Deferred income tax (benefit):
U.S. federal	$	39,227		$	(46,345	)	$	(51,145	)
State and local		2,742			(7,757	)		(8,426	)
Total	$	41,969		$	(54,102	)	$	(59,571	)
Total provision (benefit) for income taxes	$	20,397		$	(10,212	)	$	89,018

Components of Deferred Income Tax Assets (Liabilities)

The following table sets forth the components of our deferred income tax assets (liabilities) as of the dates indicated:

	As of December 31,
	2014			2013
Deferral of book costs	$	(1,575	)	$	(1,748	)
Property and equipment		0			(1,807	)
Pension		(11,113	)		(10,566	)
Other		(1,972	)		(1,189	)
Gross deferred tax (liabilities)	$	(14,660	)	$	(15,310	)
Deferred revenue	$	10,082		$	10,902
Accounts receivable		910			3,551
Property and equipment		2,495			0
Legal accrual		5,796			3,455
Compensation and benefits		2,410			3,316
Stock-based compensation		19,394			20,794
Operating leases		2,189			2,386
Other assets		9,736			8,356
Other contingent liabilities		64,236			108,423
Gross deferred tax assets	$	117,248		$	161,183
Net deferred income tax asset	$	102,588		$	145,873

Difference Between U.S. Federal Statutory Income Tax Rate and Effective Income Tax Rate as a Percentage of Income

The difference between the U.S. federal statutory income tax rate and our effective income tax rate as a percentage of income in the periods indicated is reconciled in the following table:

	Year Ended December 31,
	2014			2013			2012
U.S. federal statutory income tax rate		35.0	%		(35.0	%)		35.0	%
Rate differential on VIEs		0.8	%		11.9	%		0	%
State income taxes, net of federal benefit		3.1	%		(5.6	%)		3.4	%
Permanent book/tax differences		2.5	%		2.8	%		0.9	%
Other		(0.3	%)		(1.5	%)		(0.3	%)
Effective income tax rate		41.1	%		(27.4	%)		39.0	%

Activity with Respect to Unrecognized Tax Benefits

The following table sets forth the activity with respect to our unrecognized tax benefits in the period indicated:

	Year Ended December 31,
	2014			2013			2012
Balance as of January 1	$	22,291		$	20,690		$	22,050
Increases (decreases) from:
Tax positions taken during a prior period		5,620			1,675			195
Tax positions taken during the current period		537			870			759
Settlements with taxing authorities		(2,551	)		186			(1,027	)
Lapse of statute of limitations		(997	)		(1,130	)		(1,287	)
Balance as of December 31	$	24,900		$	22,291		$	20,690