Long-Term Debt (Schedule of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt current and noncurrent	$ 91,091	$ 89,796
Less: current portion of long-term debt	(3,000)	(3,000)
Long-term debt	88,091	86,796
Revolving credit facility [Member]
Debt Instrument [Line Items]
Long-term debt current and noncurrent	51,350	49,350
Term loan [Member]
Debt Instrument [Line Items]
Long-term debt current and noncurrent	16,250	18,500
Convertible notes [Member]
Debt Instrument [Line Items]
Long-term debt current and noncurrent	20,000	20,000
Swing loan credit facility [Member]
Debt Instrument [Line Items]
Long-term debt current and noncurrent	$ 3,491	$ 1,946