Annual report pursuant to Section 13 and 15(d)

Derivative Instruments (Details)

v3.6.0.2
Derivative Instruments (Details) - Interest Rate Swap [Member] - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Apr. 24, 2017
Dec. 20, 2012
Derivative [Line Items]        
Derivative, notional amount       $ 187,500,000.0
Derivative, fixed interest rate       0.8525%
Interest rate, all inclusive 2.3525%      
Change in fair value of derivative instrument $ (2,300,000) $ 200,000    
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months 100,000      
Other Assets [Member]        
Derivative [Line Items]        
Derivative Asset $ 3,600,000      
Other Liabilities [Member]        
Derivative [Line Items]        
Derivative Liability   $ 200,000    
Scenario, Forecast [Member]        
Derivative [Line Items]        
Derivative, notional amount     $ 250,000,000  
Derivative, fixed interest rate     1.05%