CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 50,204	$ 43,455	$ 43,344
Adjustments to reconcile net income to net cash (used in) provided by operating activities
Deferred income tax expense	3,421	896	1,701
Stock option compensation expense	2,374	2,017	1,536
Depreciation	779	551	549
Amortization of purchased intangible assets	531	243	243
Gains on the deconsolidation of variable interest entities	(349)		(2,444)
Other	107
Changes in operating assets and liabilities
Accounts receivable	(12,194)	(3,879)	1,294
Costs and estimated earnings in excess of billings	1,972	72	722
Prepaid expenses and other assets	(2,751)	501	598
Accounts payable and accrued expenses	(12,196)	22,645	(10,513)
Billings in excess of costs and estimated earnings	(64,930)	26,828	61,377
Other Comprehensive loss	(565)
Net cash (used in) provided by operating activities	(33,597)	93,329	98,407
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of short-term investments	(252,000)
Maturities of short-term investments	138,000
Purchase of subsidiaries, net of cash acquired (Note 4)	(17,379)
Purchases of property and equipment	(3,118)	(2,936)	(1,136)
Loans to energy project developers	(1,052)	(614)	(2,450)
Payments received on loans made to variable interest entities	5,012		8,915
Net cash (used in) provided by investing activities	(130,537)	(3,550)	5,329
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividends	(10,378)	(10,166)	(10,640)
Cash distributions to joint venture partner		(25,000)
Proceeds from the exercise of stock options	1,818	5,389	3,794
Excess income tax benefit on exercised stock options		1,480	576
Excess income tax expense on exercised stock options	(86)
Deconsolidation of the cash of variable interest entities	(2)		(399)
Net cash used in financing activities	(8,648)	(28,297)	(6,669)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(172,782)	61,482	97,067
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	333,691	272,209	175,142
CASH AND CASH EQUIVALENTS, END OF YEAR	160,909	333,691	272,209
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for income taxes	$ 25,678	$ 18,662	$ 24,723
Common stock issued in connection with the acquisition of APC (noncash transaction, see Note 4)	3,536