XML 36 R24.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Deferred Compensation and Retirement Plans (Tables) | 3 Months Ended
--- | ---
Jul. 31, 2017
Components of Net Periodic Benefits Costs | The components of net periodic benefit costs are as follows:
|  | Three Months Ended July 31, |
|  | 2017 |  |  | 2016 |
|  | (in thousands) |
Service cost |  | $ | 2,126 |  |  | $ | 609 |
Interest cost |  |  | 959 |  |  |  | 1,062 |
Amortization of actuarial loss |  |  | 577 |  |  |  | 763 |
Expected return on plan assets (1) |  |  | (399 | ) |  |  | (390 | )
Net periodic benefit costs |  | $ | 3,263 |  |  | $ | 2,044 |
(1) | The expected long-term rate of return on plan assets is 6.50% for July 31,2017 and 2016.

X
- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2439-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2417-114920 Reference 3: 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=82843861&loc=d3e2410-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=77993564&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration