Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of Cash Flow, Supplemental Disclosures

Table 2.1: Certain Cash and Non-Cash Transactions
	For the Year Ended December 31,
	2017		2016		2015
	(in thousands)
Cash paid during the period for:
Interest paid on term loan	$	10,000	$	10,996	$	13,525
Income taxes paid, net	19,836		19,105		1,870

Significant Customers, as Measured by Percentage of Total Revenues/Accounts Receivable

Table 2.2: Significant Customer Net Sales as a Percentage of Total Net Sales
	For the Year Ended December 31,
	2017		2016		2015
Lowe's	14	%	15	%	16	%
Foundation Building Materials	11	%	*		*

* Foundation Building Materials was not considered a significant customer in prior years.

Table 2.3: Significant Customer Accounts Receivable as a Percentage of Total Accounts Receivable
	As of December 31,
	2017		2016
Lowe's	25	%	32	%
Foundation Building Materials	9	%	*

* Foundation Building Materials was not considered a significant customer in prior years.