XML 65 R55.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fair Value of Derivatives and Financial Instruments (Outstanding Interest Rate Derivatives Designated as Cash Flow Hedges of Interest Rate Risk) (Details) - Designated as Hedging Instrument
Dec. 31, 2017
USD ($)
Contract
Interest Rate Cap  
Derivative  
Number of Instruments | Contract 1
Derivative, Notional Amount | $ $ 25,000,000
Interest Rate Swap  
Derivative  
Number of Instruments | Contract 10
Derivative, Notional Amount | $ $ 550,000,000