Retirement plans Cash flows (Tables)

12 Months Ended

Jan. 31, 2017

Defined Benefit Plan Disclosure [Line Items]

Schedule of Expected Benefit Payments [Table Text Block]

Cash flows
Expected employer contributions for the fiscal year ending January 31, 2018		$—
Expected employee contributions for the fiscal year ending January 31, 2018	—
Estimated future benefit payments reflecting expected future service for the fiscal year(s) ending January 31,:
2018	348
2019	345
2020	347
2021	342
2022	347
2023 - 2027	$1,733