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

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Allowance for Doubtful Accounts Receivable

Additions, deductions and balances for allowance for doubtful accounts for 2015, 2014 and 2013 are as follows (in thousands):

	2015		2014		2013
Balance at beginning of year	$	2,253	$	2,261	$	2,906
Additions:
Charged to costs and expense	2,057		2,755		2,098
Recovery of previous write-offs	1,613		1,516		1,929
Uncollectible receivables written off	3,877		4,279		4,672
Balance at end of year	$	2,046	$	2,253	$	2,261