Consolidated Statements of Changes in Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities
Net income (loss)	$ 22,867	$ (6,858)	$ 4,988
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	6,359	5,696	5,476
Amortization of financing fees	2,020	1,653	1,498
Amortization of debt discount	793	381	348
Gain on effective settlement of contract	(15,264)
Pension curtailment expense		1,325
Deferred income taxes	29	39	(271)
Loss (gain) on sale/disposal of fixed assets	205	4	(12)
Debt prepayment expense			295
Amortization of deferred revenue	(127)	(79)	(125)
Common unit compensation expense	27	17
Changes in operating assets and liabilities, net of acquisition:
Accounts receivable	3,484	7,829	(15,761)
Inventories	(19,126)	(4,158)	(4,765)
Prepaid expense and other current assets	(904)	(919)	405
Accounts payable and accrued expense	(4,674)	5,201	8,001
Accrued pension and retirement liabilities	(1,099)	(172)	(622)
Customer advances and deferred income	8,186	2,001	(46)
Other	261	463	(104)
Net cash provided by (used in) operating activities	3,037	12,423	(695)
Investing Activities
Purchase of property and equipment	(8,598)	(4,410)	(5,600)
Proceeds from sale/disposal of property		66	12
Business acquisition, net of cash acquired and reinvested Merger consideration	(59,488)
Change in restricted cash	244	464	(1,380)
Net cash used in investing activities	(67,842)	(3,880)	(6,968)
Financing Activities
Debt issuance costs	(2,120)		(1,636)
Proceeds from the issuance of long-term debt	47,707
Repayment of long-term debt	(1,250)
Line of credit advances	10,083	6
Line of credit repayments	(3,006)
Purchase of common units	(14,000)
Proceeds from the issuance of common units, net of reinvested consideration proceeds	5,000
Capital lease obligation payments	(393)	(1,148)	(1,229)
Distributions paid to members	(6,370)	(3,343)	(12,889)
Net cash provided by (used in) financing activities	35,651	(4,485)	(15,754)
Effect of exchange rates on cash and cash equivalents	(625)	79	209
Change in cash and cash equivalents	(29,779)	4,137	(23,208)
Cash and cash equivalents, beginning of period	42,373	38,236	61,444
Cash and cash equivalents, end of period	12,594	42,373	38,236
Supplemental Disclosure of Cash Flow Information
Cash paid for interest	24,808	22,198	22,075
Cash paid for income taxes	1,466	3,207	2,574
Non-cash consideration for sale of equipment		75
Accrued purchases of fixed assets	134	516	364
Accrued distributions to members	$ 2,947		$ 3,343