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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Amounts reclassified from accumulated other comprehensive loss to interest expense, income tax expense | $ 876 | $ 3,066 | $ 4,443
Unrealized (losses) gains on interest rate swaps and interest rate caps, income tax expense (benefit) | 254 | 362 | (929)
Unrealized holding (losses) gains on available for sale securities, income tax expense (benefit) | (349) | 1,685 | 250
Pension liability adjustments, income tax expense (benefit) | 269 | 2,601 | (13,057)
Other, income tax expense (benefit) | (3,550) | $ 342 | $ (3,705)
Accounting Standards Update 2016-01 |  |  |
Adoption of Accounting Standards Update 2016-01, income tax benefit | $ (2,141) |  |

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