Long-Term Debt (Long-term Debt Table) (Details)
|
3 Months Ended |
6 Months Ended |
|
|
Jun. 30, 2018
USD ($)
|
Jun. 30, 2017
USD ($)
|
Jun. 30, 2018
USD ($)
|
Jun. 30, 2017
USD ($)
|
Dec. 31, 2017
USD ($)
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Accumulated Amortization, Debt Issuance Costs |
$ 4,518,000
|
|
$ 4,518,000
|
|
$ 4,442,000
|
| Carrying value of the liability component |
318,807,000
|
|
318,807,000
|
|
0
|
| Debt issuance costs |
0
|
|
0
|
|
(967,000)
|
| Current maturities on long-term debt |
(2,072,000)
|
|
(2,072,000)
|
|
(16,927,000)
|
| Long-term debt, excluding current maturities |
7,818,000
|
|
7,818,000
|
|
212,154,000
|
| Revolving credit facility present accordion provisions |
75,000,000
|
|
75,000,000
|
|
|
| Amortization of Debt Issuance Costs |
|
|
320,000
|
$ 408,000
|
|
| Credit Agreement 2018 [Member] | Revolving Credit Facility [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Accumulated Amortization, Debt Issuance Costs |
13,000
|
|
13,000
|
|
|
| Carrying value of the liability component |
|
|
|
|
0
|
| Debt issuance costs |
(849,000)
|
|
(849,000)
|
|
0
|
| Amortization of Debt Issuance Costs |
13,000
|
|
13,000
|
|
|
| Credit Agreement [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Amortization of Debt Issuance Costs |
|
$ 100,000
|
|
|
|
| Credit Agreement [Member] | Revolving Credit Facility [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Carrying value of the liability component |
|
|
|
|
92,000,000
|
| Credit Agreement [Member] | Term Loan [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Carrying value of the liability component |
0
|
|
0
|
|
127,500,000
|
| Current maturities on long-term debt |
0
|
|
0
|
|
(15,000,000)
|
| Notes Payable, Other Payables [Member] | Acquisition Debt, Deferred Purchase Price [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Carrying value of the liability component |
9,890,000
|
|
9,890,000
|
|
10,548,000
|
| Current maturities on long-term debt |
$ (2,072,000)
|
|
$ (2,072,000)
|
|
$ (1,927,000)
|
| Term Number Two [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Ratio of indebtedness to net capital (in Ratio) (below at March 31, 2015) |
5.5
|
|
5.5
|
|
|
| Revolving Credit Facility [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Revolving credit facility, maximum borrowing capacity |
$ 200,000,000
|
|
$ 200,000,000
|
|
|
| Revolving Credit Facility [Member] | Credit Agreement 2018 [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Amount drawn under term loan facility |
0
|
|
0
|
|
|
| Revolving Credit Facility [Member] | Credit Agreement [Member] |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Amount drawn under term loan facility |
$ 0
|
|
$ 0
|
|
|