Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Hierarchy) (Details)

v3.10.0.1
Fair Value Measurements (Hierarchy) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Interest rate swaps (prepaids and other assets) $ 8,928 $ 5,533
Total assets 8,928 5,533
Interest rate swaps (other liabilities)   188
Total liabilities   188
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Interest rate swaps (prepaids and other assets) 0 0
Total assets 0 0
Interest rate swaps (other liabilities)   0
Total liabilities   0
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Interest rate swaps (prepaids and other assets) 8,928 5,533
Total assets 8,928 5,533
Interest rate swaps (other liabilities)   188
Total liabilities   188
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Interest rate swaps (prepaids and other assets) 0 0
Total assets $ 0 0
Interest rate swaps (other liabilities)   0
Total liabilities   $ 0