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PENSION PLANS. (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Components of net periodic benefit costs are as follows: |  |  |
Loss (gain) recognized in other comprehensive income (expense) | $ (386) | $ 3,660 | $ (1,040)
Retirement Plan [Member] |  |  |
Changes in plan assets: |  |  |
Fair value of plan assets, beginning | 12,423 | 12,567 | 13,180
Actual gains (losses) | 1,722 | 523 | (298)
Benefits paid | (665) | (667) | (315)
Company contributions | 478 |  |
Participant contributions |  |  |
Fair value of plan assets, ending | 13,958 | 12,423 | 12,567
Amounts recognized in the consolidated balance sheets: |  |  |
Other liabilities | (5,700) | (6,032) | (3,985)
Accumulated other comprehensive loss (income) | 726 | 1,047 | (885)
Components of net periodic benefit costs are as follows: |  |  |
Service cost | 391 | 223 | 211
Interest cost | 750 | 686 | 338
Expected return on plan assets | (674) | (794) | (500)
Net periodic benefit cost | 467 | 115 | 49
Loss (gain) recognized in other comprehensive income (expense) | $ (321) | $ 1,932 | $ (885)
Assumptions used in computation benefit obligations: |  |  |
Discount rate | 3.60% | 4.15% | 4.23%
Expected long-term return on plan assets | 6.00% | 6.75% | 7.75%

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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 + Details
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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