Long Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Total long-term debt	$ 161,852	$ 143,509
Current portion of long-term debt	1,050	54,557
Long-term debt	160,802	88,952
Revolving Line of Credit [Member]
Debt Instrument [Line Items]
Total long-term debt	153,000	80,000
Term Loan [Member]
Debt Instrument [Line Items]
Total long-term debt	0	53,588
Convertible Subordinated Debt [Member]
Debt Instrument [Line Items]
Total long-term debt	227	327
Mortgages Notes [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 8,625	$ 9,594