CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Tax effect on fair value of interest rate swap and rate cap agreements | $ 2,351 | $ 2,178 | $ 205 |
| Tax expense (benefit) associated with change in pension actuarial (income) loss | (163) | ||
| Accumulated Other Comprehensive Income (Loss) [Member] | |||
| Tax effect on fair value of interest rate swap and rate cap agreements | 2,351 | 2,178 | 205 |
| Tax expense (benefit) associated with change in pension actuarial (income) loss | $ (163) | $ (112) | $ 280 |
| X | ||||||||||
- Definition Amount of tax expense (benefit) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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