Basis of Presentation and Significant Accounting Policies - (Tables)

12 Months Ended

Dec. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Allowance for doubtful accounts activity

Accounts receivable allowance activity is presented in the table below:

	2014			2013			2012
Balance, beginning of year	$	3,463		$	3,529		$	3,584
Add Provision charged to expense	465			484			1,420
Recoveries	139			173			90
Less Charges against allowance	(692		)	(723		)	(1,565		)
Balance, end of year	$	3,375		$	3,463		$	3,529

Non-cash investing financing activities and supplemental cash flow information

Non-cash investing and financing activities and supplemental disclosures of consolidated cash flow information are as follows:

	Year ended December 31,
	2014		2013		2012
Non-cash investing and financing activities:
Capital expenditures financed by accounts payable	$	434	$	1,219	$	479
Capital lease obligations	873		21		1,009
Cash paid during the year for:
Interest	32,278		33,266		34,051
Income taxes	1,800		2,417		5,557
Cash received during the year for:
Income tax refunds	2,284		3,015		3,184

Allowance for obsolete inventory [Table Text Block]

Excess and obsolete inventory allowance activity is presented in the table below:

	2014			2013			2012
Balance, beginning of year	$	7,329		$	7,835		$	7,000
Add Provision charged to expense	9,979			2,259			1,153
Less Charges against allowance	(2,127		)	(2,765		)	(318		)
Balance, end of year	$	15,181		$	7,329		$	7,835

Estimated useful lives of plant and equipment

The Company provides for depreciation of plant and equipment sufficient to amortize the cost over their estimated useful lives as follows:

Buildings and building improvements	3 – 40 years
Plant equipment	3 – 25 years
Furniture and fixtures	2 – 10 years
Vehicles and office equipment	3 – 10 years

Basic and diluted earnings per share calculations

The following table is a reconciliation of the basic and diluted earnings per share calculations:

	Year ended December 31,
	2014			2013			2012
Numerator:
Net loss	$	(134,701	)	$	(33,962	)	$	(9,748	)
Denominator:
Denominator for basic loss per share:
Weighted average common shares outstanding	23,359			23,214			22,993
Effect of dilutive securities:
Outstanding common stock equivalents	—			—			—
Denominator for diluted loss per share	23,359			23,214			22,993
Basic loss per share	$	(5.77	)	$	(1.46	)	$	(0.42	)
Diluted loss per share	$	(5.77	)	$	(1.46	)	$	(0.42	)
Excluded outstanding share-based awards having an anti-dilutive effect	388			717			994
Excluded "in the money" portion of Convertible Notes having an anti-dilutive effect	365			2,032			1,416