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Pension Plan | 6 Months Ended
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Jun. 30, 2015
Pension Plan [Abstract] |
Pension Plan | 8. PENSION PLAN The Company’s Canadian subsidiary sponsors a defined benefit pension plan at one of its locations in which a majority of its employees there are members. The subsidiary funds 100% of all contributions to the plan. The benefits, or the rate per year of credit service, are established by the Company and updated at its discretion. The components of the expense the Company incurred under the pension plan are as follows (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Current service cost, net of employee contributions | $ | 14 |  | $ | 9 |  | $ | 29 |  | $ | 20
Interest cost on accrued benefit obligation |  | 27 |  |  | 32 |  |  | 55 |  |  | 64
Expected return on plan assets |  | (44) |  |  | (44) |  |  | (85) |  |  | (86)
Amortization of transitional obligation |  | 3 |  |  | 3 |  |  | 5 |  |  | 6
Amortization of past service costs |  | 2 |  |  | 2 |  |  | 4 |  |  | 4
Amortization of net actuarial gain |  | 9 |  |  | 8 |  |  | 19 |  |  | 17
Total cost of benefit | $ | 11 |  | $ | 10 |  | $ | 27 |  | $ | 25
The Company’s policy is to fund the pension plan at or above the minimum level required by law. The Company made $59,000 and $68,000 of contributions to its defined benefit pension plan during the six months ended June 30, 2015 and 2014, respectively. Changes in the discount rate and actual investment returns that are lower than the long-term expected return on plan assets could result in the Company making additional contributions.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=35742057&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2410-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39675-114964 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414199&loc=d3e39622-114963 + Details
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