Changes in Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Changes in Accumulated Other Comprehensive Loss |
|
|
|
| Balance, beginning of period |
$ 693,984
|
$ 636,156
|
$ 463,180
|
| Total other comprehensive income (loss) |
2,653
|
5,158
|
(1,942)
|
| Balance, end of period |
397,841
|
693,984
|
636,156
|
| Derivatives |
|
|
|
| Changes in Accumulated Other Comprehensive Loss |
|
|
|
| Balance, beginning of period |
(3,658)
|
(7,705)
|
|
| Other comprehensive income before reclassifications of gain (loss) |
2,486
|
4,047
|
|
| Total other comprehensive income (loss) |
2,486
|
4,047
|
|
| Balance, end of period |
(1,172)
|
(3,658)
|
(7,705)
|
| Accumulated Other Comprehensive Loss |
|
|
|
| Changes in Accumulated Other Comprehensive Loss |
|
|
|
| Balance, beginning of period |
(8,094)
|
(13,252)
|
(11,310)
|
| Other comprehensive income before reclassifications of gain (loss) |
2,635
|
5,239
|
|
| Amount of gain (loss) reclassified from accumulated other comprehensive (loss) income |
18
|
(81)
|
|
| Total other comprehensive income (loss) |
2,653
|
5,158
|
(1,942)
|
| Balance, end of period |
(5,441)
|
(8,094)
|
(13,252)
|
| Pension Plan |
|
|
|
| Changes in Accumulated Other Comprehensive Loss |
|
|
|
| Balance, beginning of period |
(4,436)
|
(5,547)
|
|
| Other comprehensive income before reclassifications of gain (loss) |
149
|
1,192
|
|
| Amount of gain (loss) reclassified from accumulated other comprehensive (loss) income |
18
|
(81)
|
|
| Total other comprehensive income (loss) |
167
|
1,111
|
|
| Balance, end of period |
$ (4,269)
|
$ (4,436)
|
$ (5,547)
|