Long-Term Debt (Long-term Debt Table) (Details) - USD ($) $ in Thousands |
Jun. 30, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Current maturities on long-term debt | $ (10,491) | $ (9,630) |
| Long-term debt, excluding current maturities | 156,971 | 152,387 |
| Credit Agreement [Member] | Revolving Credit Facility [Member] | ||
| Debt Instrument [Line Items] | ||
| Carrying value of the liability component | 40,500 | |
| Credit Agreement [Member] | Term Loan [Member] | ||
| Debt Instrument [Line Items] | ||
| Carrying value of the liability component | 115,625 | 120,312 |
| Notes Payable, Other Payables [Member] | Acquisition Debt, Deferred Purchase Price [Member] | ||
| Debt Instrument [Line Items] | ||
| Carrying value of the liability component | $ 5,437 | $ 1,205 |