Income taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income taxes

Schedule of income tax expense (benefit) by jurisdiction

	2013			2012			2011
U.S. federal:
Current	$	(402	)	$	1,651		$	1,971
Deferred		983			1,189			2,261
Total U.S. federal	$	581		$	2,840		$	4,232
U.S. state and local:
Current	$	248		$	327		$	1,092
Deferred		457			(202	)		(1,260	)
Total U.S. state and local	$	705		$	125		$	(168	)

Schedule of reconciliation of tax rates

	2013			2012			2011
Federal statutory rate		34.0	%		34.0	%		34.0	%
State and local		(5.7	)		1.1			(0.7	)
Foreign rate differential		(3.2	)		—			—
Stock options		(0.7	)		(2.6	)		1.9
Non-controlling interests		15.2			(2.2	)		(2.0	)
Valuation allowance		(119.1	)		—			—
Transaction costs		(6.7	)		—			—
Purchase price adjustments		6.6			—			—
Revaluation of deferred tax assets		2.8			—			—
Uncertain tax positions		(2.9	)		—			3.7
Return to provision		9.3			(5.3	)		0.2
Other		1.1			2.0			(0.1	)
Income taxes		(69.3	)%		27.0	%		37.0	%

Schedule of deferred tax assets and liabilities

	2013			2012
Deferred tax assets:
Net operating loss carryforwards	$	3,508		$	1,917
Outside basis differences for U.S. partnerships		2,842			3,289
Stock options		3,018			2,086
Deferred revenue		516			873
Deferred compensation		355			340
State taxes		34			5
Other		404			347
Valuation allowance		(3,963	)		(1,669	)
Net deferred tax assets		6,714			7,188
Deferred tax liabilities:
Intangible assets		(6,737	)		(1,539	)
Property and equipment		(2,154	)		(189	)
Net deferred tax liabilities		(8,891	)		(1,728	)
Net deferred taxes	$	(2,177	)	$	5,460

Schedule of changes in the valuation allowance

	Valuation Allowance
Balance, December 31, 2010	$	3,109
Decrease credited to operations		(1,287	)
Balance, December 31, 2011		1,822
Additions charged to operations		51
Decrease credited to operations		(204	)
Balance, December 31, 2012		1,669
Additions charged to operations		2,294
Decrease credited to operations		—
Balance, December 31, 2013	$	3,963

Schedule of reconciliation of unrecognized tax benefits, excluding interest and penalties

	Uncertain Tax Positions
Balance, December 31, 2012	$	392
Additions for current period tax positions		—
Balance, December 31, 2013	$	392