Derivatives - Notional Amounts - Designated as Hedges (Details) - USD ($)
|
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Not Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
$ 14,620,000
|
$ 40,165,000
|
|
| Gain (Loss) |
195,000
|
(54,000)
|
|
| Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
164,358,000
|
213,164,000
|
|
| Unrealized Gain (Loss) |
776,000
|
2,183,000
|
|
| Foreign exchange forward |
|
|
|
| Derivative [Line Items] |
|
|
|
| Gain (Loss) |
2,573,000
|
1,112,000
|
$ 338,000
|
| Foreign exchange forward | Not Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Gain (Loss) |
195,000
|
(54,000)
|
|
| USD / AUD | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
5,841,000
|
2,910,000
|
|
| Unrealized Gain (Loss) |
316,000
|
(83,000)
|
|
| USD / CAD | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
2,604,000
|
3,893,000
|
|
| Unrealized Gain (Loss) |
(18,000)
|
181,000
|
|
| USD / CHF | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
370,000
|
0
|
|
| Unrealized Gain (Loss) |
15,000
|
0
|
|
| USD / CNY | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
11,252,000
|
16,786,000
|
|
| Unrealized Gain (Loss) |
(301,000)
|
(282,000)
|
|
| USD / EUR | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
60,387,000
|
72,758,000
|
|
| Unrealized Gain (Loss) |
1,826,000
|
2,681,000
|
|
| USD / GBP | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
3,253,000
|
3,862,000
|
|
| Unrealized Gain (Loss) |
(75,000)
|
22,000
|
|
| USD / NZD | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
9,650,000
|
4,893,000
|
|
| Unrealized Gain (Loss) |
(64,000)
|
37,000
|
|
| USD / SEK | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
4,923,000
|
5,128,000
|
|
| Unrealized Gain (Loss) |
146,000
|
39,000
|
|
| USD / MXP | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
6,148,000
|
8,494,000
|
|
| Unrealized Gain (Loss) |
(417,000)
|
(284,000)
|
|
| EUR / AUD | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
506,000
|
669,000
|
|
| Unrealized Gain (Loss) |
6,000
|
(10,000)
|
|
| EUR / CAD | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
0
|
1,283,000
|
|
| Unrealized Gain (Loss) |
0
|
(17,000)
|
|
| EUR / CHF | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
0
|
1,944,000
|
|
| Unrealized Gain (Loss) |
0
|
(17,000)
|
|
| EUR / GBP | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
14,511,000
|
36,567,000
|
|
| Unrealized Gain (Loss) |
(686,000)
|
(424,000)
|
|
| EUR / NOK | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
2,503,000
|
3,375,000
|
|
| Unrealized Gain (Loss) |
(25,000)
|
(55,000)
|
|
| EUR / SEK | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
0
|
2,464,000
|
|
| Unrealized Gain (Loss) |
0
|
(42,000)
|
|
| EUR / NZD | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
3,777,000
|
3,609,000
|
|
| Unrealized Gain (Loss) |
16,000
|
476,000
|
|
| GBP / AUD | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
503,000
|
830,000
|
|
| Unrealized Gain (Loss) |
34,000
|
(46,000)
|
|
| GBP / CHF | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
215,000
|
463,000
|
|
| Unrealized Gain (Loss) |
(10,000)
|
(7,000)
|
|
| GBP / SEK | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
1,389,000
|
2,067,000
|
|
| Unrealized Gain (Loss) |
(42,000)
|
(1,000)
|
|
| AUD / NZD | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
0
|
352,000
|
|
| Unrealized Gain (Loss) |
0
|
8,000
|
|
| CHF / DKK | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
595,000
|
0
|
|
| Unrealized Gain (Loss) |
(2,000)
|
0
|
|
| DKK / SEK | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
31,978,000
|
37,293,000
|
|
| Unrealized Gain (Loss) |
49,000
|
46,000
|
|
| NOK / CHF | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
1,335,000
|
0
|
|
| Unrealized Gain (Loss) |
(13,000)
|
0
|
|
| NOK / SEK | Designated as Hedging Instrument |
|
|
|
| Derivative [Line Items] |
|
|
|
| Notional Amount |
2,618,000
|
3,524,000
|
|
| Unrealized Gain (Loss) |
$ 21,000
|
$ (39,000)
|
|