Supplemental Guarantor Information - Consolidating Condensed Statement of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided (Used) by Operating Activities	$ 8,892	$ 10,054	$ 62,291
Investing Activities
Purchases of property and equipment	(12,327)	(14,158)	(20,091)
Proceeds from sale of property and equipment	2,521	885	159
Business acquisitions, net of cash acquired	0	0	(9,000)
Proceeds from sale of businesses	21,870	187,552	0
Other long-term assets	20,949	1,001	(265)
Other	569	65	(245)
Net Cash Provided (Used) for Investing Activities	33,582	175,345	(29,442)
Financing Activities
Proceeds from revolving lines of credit and long-term borrowings	255,658	352,455	339,314
Payments on revolving lines of credit and long-term borrowings	(286,712)	(545,874)	(367,500)
Proceeds from exercise of equity awards	480	512	0
Payments of Financing Costs	0	0	(1)
Payment of dividends	(1,584)	(1,581)	(1,581)
Net Cash Used by Financing Activities	(32,158)	(194,488)	(29,768)
Effect of exchange rate changes on cash	(1,170)	83	786
Increase (decrease) in cash and cash equivalents	9,146	(9,006)	3,867
Cash and cash equivalents at beginning of year	29,785	38,791	34,924
Cash and cash equivalents at end of year	38,931	29,785	38,791
The Company (Parent)
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided (Used) by Operating Activities	(34,135)	11,566	(46,194)
Investing Activities
Purchases of property and equipment	(2,256)	(3,601)	(2,266)
Proceeds from sale of property and equipment	0	4	12
Business acquisitions, net of cash acquired			0
Proceeds from sale of businesses	0	0
Other long-term assets	20,926	833	(381)
Other	44,420	181,195	82,999
Net Cash Provided (Used) for Investing Activities	63,090	178,431	80,364
Financing Activities
Proceeds from revolving lines of credit and long-term borrowings	255,658	323,187	337,044
Payments on revolving lines of credit and long-term borrowings	(277,570)	(516,488)	(367,500)
Proceeds from exercise of equity awards	480	512
Payments of Financing Costs			(1)
Payment of dividends	(1,584)	(1,581)	(1,581)
Net Cash Used by Financing Activities	(23,016)	(194,370)	(32,038)
Effect of exchange rate changes on cash	0	0	0
Increase (decrease) in cash and cash equivalents	5,939	(4,373)	2,132
Cash and cash equivalents at beginning of year	1,401	5,774	3,642
Cash and cash equivalents at end of year	7,340	1,401	5,774
Combined Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided (Used) by Operating Activities	(511)	(68,792)	26,243
Investing Activities
Purchases of property and equipment	(1,811)	(4,020)	(9,643)
Proceeds from sale of property and equipment	0	13	23
Business acquisitions, net of cash acquired			(9,000)
Proceeds from sale of businesses	21,870	187,552
Other long-term assets	0	0	0
Other	(14,393)	(113,067)	(10,849)
Net Cash Provided (Used) for Investing Activities	5,666	70,478	(29,469)
Financing Activities
Proceeds from revolving lines of credit and long-term borrowings	0	0	2,140
Payments on revolving lines of credit and long-term borrowings	(5,113)	(2,391)	0
Proceeds from exercise of equity awards	0	0
Payments of Financing Costs			0
Payment of dividends	0	0	0
Net Cash Used by Financing Activities	(5,113)	(2,391)	2,140
Effect of exchange rate changes on cash	0	0	0
Increase (decrease) in cash and cash equivalents	42	(705)	(1,086)
Cash and cash equivalents at beginning of year	313	1,018	2,104
Cash and cash equivalents at end of year	355	313	1,018
Combined Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided (Used) by Operating Activities	14,105	1,891	14,326
Investing Activities
Purchases of property and equipment	(8,260)	(6,537)	(8,182)
Proceeds from sale of property and equipment	2,521	868	124
Business acquisitions, net of cash acquired			0
Proceeds from sale of businesses	0	0
Other long-term assets	23	168	116
Other	(25)	20	46
Net Cash Provided (Used) for Investing Activities	(5,741)	(5,481)	(7,896)
Financing Activities
Proceeds from revolving lines of credit and long-term borrowings	0	29,268	130
Payments on revolving lines of credit and long-term borrowings	(4,029)	(26,995)	0
Proceeds from exercise of equity awards	0	0
Payments of Financing Costs			0
Payment of dividends	0	(2,694)	(4,525)
Net Cash Used by Financing Activities	(4,029)	(421)	(4,395)
Effect of exchange rate changes on cash	(1,170)	83	786
Increase (decrease) in cash and cash equivalents	3,165	(3,928)	2,821
Cash and cash equivalents at beginning of year	28,071	31,999	29,178
Cash and cash equivalents at end of year	31,236	28,071	31,999
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided (Used) by Operating Activities	29,433	65,389	67,916
Investing Activities
Purchases of property and equipment	0	0	0
Proceeds from sale of property and equipment	0	0	0
Business acquisitions, net of cash acquired			0
Proceeds from sale of businesses	0	0
Other long-term assets	0	0	0
Other	(29,433)	(68,083)	(72,441)
Net Cash Provided (Used) for Investing Activities	(29,433)	(68,083)	(72,441)
Financing Activities
Proceeds from revolving lines of credit and long-term borrowings	0	0	0
Payments on revolving lines of credit and long-term borrowings	0	0	0
Proceeds from exercise of equity awards	0	0
Payments of Financing Costs			0
Payment of dividends	0	2,694	4,525
Net Cash Used by Financing Activities	0	2,694	4,525
Effect of exchange rate changes on cash	0	0	0
Increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of year	0	0	0
Cash and cash equivalents at end of year	$ 0	$ 0	$ 0