Long-Term Debt (Details)
|
Nov. 30, 2017
USD ($)
|
Dec. 28, 2016
redetermination
|
Mar. 31, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
| Revolving Credit Facility | Line of Credit |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Borrowing base |
|
|
$ 575,000,000
|
|
| Elected commitments |
|
|
475,000,000
|
|
| Remaining borrowing capacity |
|
|
474,100,000
|
|
| Number of optional borrowing base redeterminations | redetermination |
|
2
|
|
|
| Letter of Credit | Line of Credit |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Borrowing base |
|
|
15,000,000.0
|
|
| Letters of credit outstanding |
|
|
900,000
|
|
| Minimum | Revolving Credit Facility | Line of Credit |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, covenant, minimum current ratio |
|
1
|
|
|
| Maximum | Revolving Credit Facility | Line of Credit |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, covenant, maximum leverage ratio |
|
4
|
|
|
| Senior Notes Due 2026 | Senior Notes |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Long-term debt |
$ 400,000,000
|
|
|
|
| Interest rate, stated percentage |
5.375%
|
|
|
|
| Proceeds from borrowings, net of issuance costs |
$ 391,000,000
|
|
|
|
| Debt issuance costs |
$ 9,000,000
|
|
|
|
| Percentage of principal amount, eligible to be redeemed |
35.00%
|
|
|
|
| Percentage of principal amount, redeemable |
65.00%
|
|
|
|
| Percentage of principal amount, change in control |
101.00%
|
|
|
|
| Percentage of principal amount, event of default |
25.00%
|
|
|
|
| Debt issuance costs netted to Senior Notes |
|
|
$ 9,100,000
|
$ 9,200,000
|
| Debt Instrument, Redemption, Period One | Senior Notes Due 2026 | Senior Notes |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Redemption price percentage |
105.375%
|
|
|
|
| Debt Instrument, Redemption, Period Two | Senior Notes Due 2026 | Senior Notes |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Redemption price percentage |
102.688%
|
|
|
|
| Debt Instrument, Redemption, Period Three | Senior Notes Due 2026 | Senior Notes |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Redemption price percentage |
101.344%
|
|
|
|
| Debt Instrument, Redemption, Period Four | Senior Notes Due 2026 | Senior Notes |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Redemption price percentage |
100.00%
|
|
|
|