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Comprehensive income (Tables) | 9 Months Ended
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Sep. 30, 2016
Statement Of Income And Comprehensive Income [Abstract] |
Comprehensive income |
|  | For the three months ended |  |  | For the nine months ended |
|  | September 30, 2016 |  |  | September 30, 2016 |
|  | Interest |  |  |  |  |  |  | Foreign |  |  | Accumulated |  |  | Interest |  |  |  |  |  |  | Foreign |  |  | Accumulated |
|  | rate swap |  |  |  |  |  |  | currency |  |  | other |  |  | rate swap |  |  |  |  |  |  | currency |  |  | other |
|  | and cap |  |  | Investment |  |  | translation |  |  | comprehensive |  |  | and cap |  |  | Investment |  |  | translation |  |  | comprehensive |
|  | agreements |  |  | securities |  |  | adjustments |  |  | (loss) income |  |  | agreements |  |  | securities |  |  | adjustments |  |  | (loss) income |
Beginning balance |  | $ | (18,097 | ) |  | $ | 1,986 |  |  | $ | (43,925 | ) |  | $ | (60,036 | ) |  | $ | (10,925 | ) |  | $ | 1,361 |  |  | $ | (50,262 | ) |  | $ | (59,826 | )
Unrealized (losses) gains |  |  | (255 | ) |  |  | 1,454 |  |  |  | (951 | ) |  |  | 248 |  |  |  | (13,489 | ) |  |  | 2,578 |  |  |  | 5,386 |  |  |  | (5,525 | )
Related income tax benefit (expense) |  |  | 102 |  |  |  | (391 | ) |  |  | — |  |  |  | (289 | ) |  |  | 5,251 |  |  |  | (797 | ) |  |  | — |  |  |  | 4,454 |
|  |  | (153 | ) |  |  | 1,063 |  |  |  | (951 | ) |  |  | (41 | ) |  |  | (8,238 | ) |  |  | 1,781 |  |  |  | 5,386 |  |  |  | (1,071 | )
Reclassification from accumulated other comprehensive income into net income |  |  | 634 |  |  |  | (81 | ) |  |  | 7,513 |  |  |  | 8,066 |  |  |  | 2,128 |  |  |  | (233 | ) |  |  | 7,513 |  |  |  | 9,408 |
Related income tax (expense) benefit |  |  | (246 | ) |  |  | 31 |  |  |  | — |  |  |  | (215 | ) |  |  | (827 | ) |  |  | 90 |  |  |  | — |  |  |  | (737 | )
|  |  | 388 |  |  |  | (50 | ) |  |  | 7,513 |  |  |  | 7,851 |  |  |  | 1,301 |  |  |  | (143 | ) |  |  | 7,513 |  |  |  | 8,671 |
Ending balance |  | $ | (17,862 | ) |  | $ | 2,999 |  |  | $ | (37,363 | ) |  | $ | (52,226 | ) |  | $ | (17,862 | ) |  | $ | 2,999 |  |  | $ | (37,363 | ) |  | $ | (52,226 | )
|  | For the three months ended |  |  | For the nine months ended |
|  | September 30, 2015 |  |  | September 30, 2015 |
|  | Interest |  |  |  |  |  |  | Foreign |  |  | Accumulated |  |  | Interest |  |  |  |  |  |  | Foreign |  |  | Accumulated |
|  | rate swap |  |  |  |  |  |  | currency |  |  | other |  |  | rate swap |  |  |  |  |  |  | currency |  |  | other |
|  | and cap |  |  | Investment |  |  | translation |  |  | comprehensive |  |  | and cap |  |  | Investment |  |  | translation |  |  | comprehensive |
|  | agreements |  |  | securities |  |  | adjustments |  |  | income (loss) |  |  | agreements |  |  | securities |  |  | adjustments |  |  | (loss) income |
Beginning balance |  | $ | (8,407 | ) |  | $ | 3,261 |  |  | $ | (39,233 | ) |  | $ | (44,379 | ) |  | $ | (1,795 | ) |  | $ | 3,151 |  |  | $ | (26,373 | ) |  | $ | (25,017 | )
Unrealized (losses) gains |  |  | (3,037 | ) |  |  | (2,325 | ) |  |  | (7,023 | ) |  |  | (12,385 | ) |  |  | (16,513 | ) |  |  | (1,864 | ) |  |  | (19,883 | ) |  |  | (38,260 | )
Related income tax benefit (expense) |  |  | 1,186 |  |  |  | 674 |  |  |  | — |  |  |  | 1,860 |  |  |  | 6,449 |  |  |  | 496 |  |  |  | — |  |  |  | 6,945 |
|  |  | (1,851 | ) |  |  | (1,651 | ) |  |  | (7,023 | ) |  |  | (10,525 | ) |  |  | (10,064 | ) |  |  | (1,368 | ) |  |  | (19,883 | ) |  |  | (31,315 | )
Reclassification from accumulated other comprehensive income into net income |  |  | 1,264 |  |  |  | (333 | ) |  |  | — |  |  |  | 931 |  |  |  | 3,890 |  |  |  | (617 | ) |  |  | — |  |  |  | 3,273 |
Related income tax (expense) benefit |  |  | (493 | ) |  |  | 130 |  |  |  | — |  |  |  | (363 | ) |  |  | (1,518 | ) |  |  | 241 |  |  |  | — |  |  |  | (1,277 | )
|  |  | 771 |  |  |  | (203 | ) |  |  | — |  |  |  | 568 |  |  |  | 2,372 |  |  |  | (376 | ) |  |  | — |  |  |  | 1,996 |
Ending balance |  | $ | (9,487 | ) |  | $ | 1,407 |  |  | $ | (46,256 | ) |  | $ | (54,336 | ) |  | $ | (9,487 | ) |  | $ | 1,407 |  |  | $ | (46,256 | ) |  | $ | (54,336 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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- References No definition available. + Details
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