Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Allowance for Doubtful Accounts Receivable

Additions, deductions and balances for allowance for doubtful accounts for 2019, 2018 and 2017 are as follows (in thousands):

 

	2019		2018		2017
Balance at beginning of year	$	2,070	$	2,300	$	2,156
Additions:
Charged to costs and expense	2,292		2,855		3,141
Recovery of previous write-offs	1,197		1,215		1,122
Uncollectible receivables written off	3,659		4,300		4,119
Balance at end of year	$	1,900	$	2,070	$	2,300