Interest Rate Swaps (Details 2) - Forward-starting Interest Rate Swap 1 [Member] $ in Millions |
3 Months Ended |
|---|---|
|
Mar. 31, 2018
USD ($)
| |
| Derivative [Line Items] | |
| Forward-starting interest rate swap agreement, inception date | Jul. 06, 2016 |
| Forward-starting interest rate swap agreement, effective date | Nov. 20, 2019 |
| Forward-starting interest rate swap agreement, notional amount | $ 150.0 |
| Forward-starting interest rate swap agreement, fixed interest rate | 1.1425% |
| Forward-starting interest rate swap agreement, termination date | Nov. 20, 2020 |