Supplemental Guarantor Infromation Supplemental Guarantor Information (Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	$ 82,889	$ 65,178
Cash flow from investing activities:
(Loans to) repayments from affiliates	0	0
Capital expenditures	(69,314)	(62,698)
Proceeds from derivative instruments	(573)	852
Proceeds from sale of assets	4,079	0
Other	2,834	2,333
Net cash used in investing activities	(62,974)	(59,513)
Cash flow from financing activities:
Repayments to affiliates	0
Loans from (repayments to) affiliates		0
Short-term debt borrowings	(17)	(4,082)
Revolving Facility borrowings	229,000	134,000
Revolving Facility reductions	(240,000)	(118,500)
Principal payments on long term debt	(158)	(189)
Supply chain financing	(9,455)	(14,422)
Proceeds from exercise of stock options	2,813	175
Purchase of treasury shares	(620)	(844)
Revolver Refinancing Costs	(2,741)	0
Proceeds from (Payments for) Other Financing Activities	1,011	(7,206)
Net cash provided by financing activities	(20,167)	(11,068)
Net (decrease) increase in cash and cash equivalents	(252)	(5,403)
Effect of exchange rate changes on cash and cash equivalents	(758)	(444)
Cash and cash equivalents at beginning of period	11,888	17,317	11,470
Cash and cash equivalents at end of period	10,878		11,470
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	(10,274)	(5,857)
Cash flow from investing activities:
(Loans to) repayments from affiliates	7,070	7,015
Capital expenditures	0	0
Proceeds from derivative instruments	0	0
Proceeds from sale of assets	0
Other	0	0
Net cash used in investing activities	7,070	7,015
Cash flow from financing activities:
Repayments to affiliates	0
Loans from (repayments to) affiliates		0
Short-term debt borrowings	0	0
Revolving Facility borrowings	0	0
Revolving Facility reductions	0	0
Principal payments on long term debt	0	0
Supply chain financing	0	0
Proceeds from exercise of stock options	2,813	175
Purchase of treasury shares	(620)	(844)
Revolver Refinancing Costs	0
Proceeds from (Payments for) Other Financing Activities	1,011	(489)
Net cash provided by financing activities	3,204	(1,158)
Net (decrease) increase in cash and cash equivalents	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	0		0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	50,298	50,244
Cash flow from investing activities:
(Loans to) repayments from affiliates	0	0
Capital expenditures	(49,756)	(37,081)
Proceeds from derivative instruments	(51)	(22)
Proceeds from sale of assets	1,706
Other	0	280
Net cash used in investing activities	(48,101)	(36,823)
Cash flow from financing activities:
Repayments to affiliates	(7,070)
Loans from (repayments to) affiliates		(7,015)
Short-term debt borrowings	965	0
Revolving Facility borrowings	151,000	67,000
Revolving Facility reductions	(148,000)	(73,500)
Principal payments on long term debt	(98)	(131)
Supply chain financing	0	0
Proceeds from exercise of stock options	0	0
Purchase of treasury shares	0	0
Revolver Refinancing Costs	(2,384)
Proceeds from (Payments for) Other Financing Activities	0	(16)
Net cash provided by financing activities	(5,587)	(13,662)
Net (decrease) increase in cash and cash equivalents	(3,390)	(241)
Effect of exchange rate changes on cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	4,752	4,425	4,184
Cash and cash equivalents at end of period	1,362		4,184
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	42,865	20,791
Cash flow from investing activities:
(Loans to) repayments from affiliates	0	0
Capital expenditures	(19,558)	(25,617)
Proceeds from derivative instruments	(522)	874
Proceeds from sale of assets	2,373
Other	2,834	2,053
Net cash used in investing activities	(14,873)	(22,690)
Cash flow from financing activities:
Repayments to affiliates	0
Loans from (repayments to) affiliates		0
Short-term debt borrowings	(982)	(4,082)
Revolving Facility borrowings	78,000	67,000
Revolving Facility reductions	(92,000)	(45,000)
Principal payments on long term debt	(60)	(58)
Supply chain financing	(9,455)	(14,422)
Proceeds from exercise of stock options	0	0
Purchase of treasury shares	0	0
Revolver Refinancing Costs	(357)
Proceeds from (Payments for) Other Financing Activities	0	(6,701)
Net cash provided by financing activities	(24,854)	(3,263)
Net (decrease) increase in cash and cash equivalents	3,138	(5,162)
Effect of exchange rate changes on cash and cash equivalents	(758)	(444)
Cash and cash equivalents at beginning of period	7,136	12,892	7,286
Cash and cash equivalents at end of period	9,516		7,286
Consolidating Entries and Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	0	0
Cash flow from investing activities:
(Loans to) repayments from affiliates	(7,070)	(7,015)
Capital expenditures	0	0
Proceeds from derivative instruments	0	0
Proceeds from sale of assets	0
Other	0	0
Net cash used in investing activities	(7,070)	(7,015)
Cash flow from financing activities:
Repayments to affiliates	7,070
Loans from (repayments to) affiliates		7,015
Short-term debt borrowings	0	0
Revolving Facility borrowings	0	0
Revolving Facility reductions	0	0
Principal payments on long term debt	0	0
Supply chain financing	0	0
Proceeds from exercise of stock options	0	0
Purchase of treasury shares	0	0
Revolver Refinancing Costs	0
Proceeds from (Payments for) Other Financing Activities	0	0
Net cash provided by financing activities	7,070	7,015
Net (decrease) increase in cash and cash equivalents	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	$ 0		$ 0