Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Details)

v3.10.0.1
Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance     $ 786,760  
Other comprehensive income (loss) before reclassifications     4,140  
Amounts reclassified out of accumulated other comprehensive income (loss)     33  
Other comprehensive income (loss) $ 388 $ 463 4,173 $ 1,792
Ending balance 803,844   803,844  
Other comprehensive income (loss) before reclassifications, tax expense     1,551  
Amounts reclassified out of accumulated other comprehensive income (loss), tax expense     12  
Gains and Losses on Cash Flow Hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance     1,750  
Other comprehensive income (loss) before reclassifications     4,140  
Amounts reclassified out of accumulated other comprehensive income (loss)     33  
Other comprehensive income (loss)     4,173  
Ending balance 5,923   5,923  
Defined Benefit Pension Plan        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance     (443)  
Other comprehensive income (loss) before reclassifications     0  
Amounts reclassified out of accumulated other comprehensive income (loss)     0  
Other comprehensive income (loss)     0  
Ending balance (443)   (443)  
Total Accumulated Other Comprehensive Income (Loss)        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance     1,307  
Other comprehensive income (loss)     4,173  
Ending balance $ 5,480   $ 5,480