Term Receivable and Trade Accounts Receivable Balances Term Receivables and Trade Accounts Receivable (Tables)

12 Months Ended

Jan. 31, 2015

Term Receivables and Trade Accounts Receivable [Abstract]

Term receivable and trade accounts receivable balances

Term receivable and trade accounts receivable balances were as follows:

As of January 31,	2015		2014
Trade accounts receivable	$	208,996	$	179,830
Term receivables, short-term	$	337,626	$	274,653
Term receivables, long-term	$	301,862	$	270,365

Credit risk assessment for long-term receivables

The credit risk assessment for our long-term receivables was as follows:

As of January 31,	2015		2014
S&P credit rating:
AAA+ through BBB-	$	192,430	$	180,113
BB+ and lower	31,939		29,654
	224,369		209,767
Internal credit assessment	77,493		60,598
Total long-term term receivables	$	301,862	$	270,365

Change in allowance for doubtful accounts

The following shows the change in allowance for doubtful accounts for the years ended January 31, 2015, 2014, and 2013:

Allowance for doubtful accounts	Beginning  balance		Expense adjustment			Other deductions(1)			Ending balance
Year ended January 31, 2015	$	5,469	$	(988	)	$	(264	)	$	4,217
Year ended January 31, 2014	$	5,331	$	517		$	(379	)	$	5,469
Year ended January 31, 2013	$	4,432	$	1,147		$	(248	)	$	5,331