Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total debt	$ 144,083	$ 190,575
Current maturities of long-term debt and capital lease obligations	77	551
Long-term debt and capital lease obligation, net of current maturities	144,006	190,024
Bank revolving credit facility | Amended and Restated Revolving Credit Agreement
Debt Instrument [Line Items]
Total debt	144,000	190,000
Capital lease obligations
Debt Instrument [Line Items]
Total debt	23	59
Other notes payable
Debt Instrument [Line Items]
Total debt	$ 60	$ 516