Other comprehensive (loss) income (Tables)

12 Months Ended

Dec. 31, 2015

Statement Of Income And Comprehensive Income [Abstract]

Changes in Accumulated Other Comprehensive (Loss) Income

Charges and credits to other comprehensive (loss) income have been as follows:

	Interest rate swap and cap agreements			Investment securities			Foreign currency translation adjustments			Accumulated other comprehensive income (loss)
Balance at December 31, 2012	$	(15,402	)	$	1,310		$	(1,205	)	$	(15,297	)
Unrealized (losses) gains		277			3,752			(2,216	)		1,813
Related income tax		(108	)		(1,452	)		—			(1,560	)
		169			2,300			(2,216	)		253
Reclassification from accumulated other comprehensive losses    (income) into net income		21,096			(802	)		—			20,294
Related income tax		(8,207	)		312			—			(7,895	)
		12,889			(490	)		—			12,399
Balance at December 31, 2013	$	(2,344	)	$	3,120		$	(3,421	)	$	(2,645	)
Unrealized (losses) gains		(16,509	)		425			(22,952	)		(39,036	)
Related income tax		6,450			(187	)		—			6,263
		(10,059	)		238			(22,952	)		(32,773	)
Reclassification from accumulated other comprehensive losses    (income) into net income		17,409			(340	)		—			17,069
Related income tax		(6,801	)		133			—			(6,668	)
		10,608			(207	)		—			10,401
Balance at December 31, 2014	$	(1,795	)	$	3,151		$	(26,373	)	$	(25,017	)
Unrealized losses		(20,085	)		(1,974	)		(23,889	)		(45,948	)
Related income tax		7,844			561			—			8,405
		(12,241	)		(1,413	)		(23,889	)		(37,543	)
Reclassification from accumulated other comprehensive losses    (income) into net income		5,103			(618	)		—			4,485
Related income tax		(1,992	)		241			—			(1,751	)
		3,111			(377	)		—			2,734
Balance at December 31, 2015	$	(10,925	)	$	1,361		$	(50,262	)	$	(59,826	)