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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at December 31, 2017     $ 786,760  
Other comprehensive income (loss) before reclassifications     3,664  
Amounts reclassified out of accumulated other comprehensive income (loss)     121  
Other comprehensive income (loss) $ 871 $ 26 3,785 $ 1,329
Balance at June 30, 2018 786,980   786,980  
Other comprehensive income (loss) before reclassifications, tax expense     1,373  
Amounts reclassified out of accumulated other comprehensive income (loss), tax expense     45  
Gains and Losses on Cash Flow Hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at December 31, 2017     1,750  
Other comprehensive income (loss) before reclassifications     3,664  
Amounts reclassified out of accumulated other comprehensive income (loss)     121  
Other comprehensive income (loss)     3,785  
Balance at June 30, 2018 5,535   5,535  
Defined Benefit Pension Plan        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at December 31, 2017     (443)  
Other comprehensive income (loss) before reclassifications     0  
Amounts reclassified out of accumulated other comprehensive income (loss)     0  
Other comprehensive income (loss)     0  
Balance at June 30, 2018 (443)   (443)  
Accumulated Other Comprehensive Income (Loss)        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Balance at December 31, 2017     1,307  
Other comprehensive income (loss)     3,785  
Balance at June 30, 2018 $ 5,092   $ 5,092