Comprehensive income (Tables)

3 Months Ended

Mar. 31, 2017

Statement of Comprehensive Income [Abstract]

Comprehensive income

	For the three months ended March 31, 2017												For the three months ended March 31, 2016
	Interest rate cap and swap agreements			Investment securities			Foreign currency translation adjustments			Accumulated other comprehensive (loss) income			Interest rate cap and swap agreements			Investment securities			Foreign currency translation adjustments			Accumulated other comprehensive (loss) income
Beginning balance	$	(12,029	)	$	2,175		$	(79,789	)	$	(89,643	)	$	(10,925	)	$	1,361		$	(50,262	)	$	(59,826	)
Unrealized (losses) gains	(5,217		)	2,113			13,261			10,157			(8,951		)	342			11,181			2,572
Related income tax benefit (expense)	2,029			(554		)	—			1,475			3,482			(113		)	—			3,369
	(3,188		)	1,559			13,261			11,632			(5,469		)	229			11,181			5,941
Reclassification from accumulated other comprehensive income into net income	2,070			(229		)	—			1,841			761			(152		)	—			609
Related income tax (expense) benefit	(805		)	89			—			(716		)	(296		)	59			—			(237		)
	1,265			(140		)	—			1,125			465			(93		)	—			372
Ending balance	$	(13,952	)	$	3,594		$	(66,528	)	$	(76,886	)	$	(15,929	)	$	1,497		$	(39,081	)	$	(53,513	)