XML 53 R30.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]  
Summary Of Activity Recorded Within The Allowance For Doubtful Accounts
The following table summarizes activity recorded within the allowance for doubtful accounts balances for the years ended December 31 (in thousands):
 
2018
 
2017
 
2016
Beginning balance
$
6,434

 
$
5,272

 
$
4,868

Bad debt expense
1,150

 
1,253

 
2,519

Accounts written off and other adjustments
(624
)
 
(91
)
 
(2,115
)
Ending balance
$
6,960

 
$
6,434

 
$
5,272
Summary Of Interest Capitalized And Depreciation Expense
The table below sets forth the depreciation expense recognized during the years ended December 31 (in thousands):
 
2018
 
2017
 
2016
Depreciation expense
$
12,152

 
$
12,929

 
$
14,477