Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Organization and Summary of Significant Accounting Policies [Abstract]

Shipping and handling costs associated with outbound freight

The table below presents shipping and handling costs associated with outbound freight, which we include in selling and administrative expenses (in thousands):

2017		2016		2015
$	45,247	$	39,879	$	36,783

Advertising expense

We expense advertising costs when incurred. The table below presents advertising expense for the past three years (in thousands):

2017		2016		2015
$	7,477	$	7,011	$	7,127

Fair value measurements

	Fair Value at December 31,
	2017		2016
Level 2
Unrealized gains on interest rate swaps	$	1,585	$	1,521
Unrealized losses on interest rate swaps	703		3,138
Level 3
Contingent consideration liabilities	$	1,824	$	1,611

Summary of changes in allowance for doubtful accounts

The following table summarizes the changes in our allowance for doubtful accounts for the past three years (in thousands):

	2017			2016			2015
Balance at beginning of year	$	4,050		$	4,205		$	4,008
Bad debt expense	916			1,199			1,110
Write-offs, net of recoveries	(1,069		)	(1,354		)	(913		)
Balance at end of year	$	3,897		$	4,050		$	4,205

Summary of changes in allowance for inventory obsolescence

The following table summarizes the changes in our reserve for inventory obsolescence for the past three years (in thousands):

	2017			2016			2015
Balance at beginning of year	$	6,531		$	6,979		$	6,403
Provision for inventory write-downs	2,660			2,036			3,043
Deduction for inventory write-offs	(2,927		)	(2,484		)	(2,467		)
Balance at end of year	$	6,264		$	6,531		$	6,979

Estimated useful lives of property and equipment

We depreciate property and equipment on a straight-line basis over the following estimated useful lives:

Buildings	40 years
Leasehold improvements (1)	1 - 10 years
Autos and trucks	3 - 6 years
Machinery and equipment	3 - 15 years
Computer equipment	3 - 7 years
Furniture and fixtures	5 - 10 years

⁽¹⁾  For substantial improvements made near the end of a lease term where we are reasonably certain the lease will be renewed, we amortize the leasehold improvement over the remaining life of the lease including the expected renewal period.

Depreciation expense

The table below presents depreciation expense for the past three years (in thousands):

2017		2016		2015
$	24,157	$	20,338	$	16,373

Redeemable noncontrolling interest

The table below presents the changes in Redeemable noncontrolling interest (in thousands):

	2017			2016			2015
Redeemable noncontrolling interest, beginning of period	$	2,287		$	2,665		$	3,113
Redemption value adjustment of noncontrolling interest	360			—			—
Net loss attributable to noncontrolling interest	(294		)	(352		)	(51		)
Other comprehensive income (loss) attributable to noncontrolling interest	220			(26		)	(397		)
Less: purchase of redeemable noncontrolling interest	2,573			—			$	—
Redeemable noncontrolling interest, end of period	$	—		$	2,287		$	2,665

Accumulated other comprehensive loss

The table below presents the components of our Accumulated other comprehensive loss balance (in thousands):

	December 31,
	2017			2016
Foreign currency translation adjustments	$	(7,478	)	$	(13,024	)
Unrealized gains (losses) on interest rate swaps, net of tax (1)	150			(1,054		)
Accumulated other comprehensive loss	$	(7,328	)	$	(14,078	)

Supplemental disclosures to Consolidated Statements of Cash Flows

The following table presents supplemental disclosures to the accompanying Consolidated Statements of Cash Flows (in thousands):

	Year Ended December 31,
	2017		2016		2015
Cash paid during the year for:
Interest	$	12,957	$	8,052	$	6,316
Income taxes, net of refunds	84,251		80,378		65,668