Annual report pursuant to Section 13 and 15(d)

Derivative Financial Instruments - Narrative (Details)

v3.6.0.2
Derivative Financial Instruments - Narrative (Details) - Designated as Hedging Instrument [Member]
1 Months Ended
Apr. 30, 2016
USD ($)
swaps
Dec. 31, 2016
USD ($)
Derivative [Line Items]    
Notional Amount   $ 325,000,000
Interest Rate Swap Four, Five, Six, & Seven [Member]    
Derivative [Line Items]    
Number of swaps entered into | swaps 4  
Derivative, Fixed Interest Rate 1.03%  
Notional Amount $ 175,000,000