Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Advertising Costs

Advertising costs for the three and six months ended June 30, 2018 and 2017, are reflected in the following table (in thousands):

	Three Months Ended   June 30,				Six Months Ended   June 30,
	2018		2017		2018		2017
Advertising costs	$	14,416	$	12,225	$	27,497	$	23,696