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

12 Months Ended

Jan. 31, 2014

Term Receivables and Trade Accounts Receivable [Abstract]

Schedule of Term Receivable and Trade Accounts Receivable

Term receivable and trade accounts receivable balances were as follows:

As of January 31,	2014		2013
Trade accounts receivable	$	179,830	$	178,351
Term receivables, short-term	$	274,653	$	233,894
Term receivables, long-term	$	270,365	$	250,497

Credit Quality Indicators

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

As of January 31,	2014		2013
S&P credit rating:
AAA+ through BBB-	$	180,113	$	133,773
BB+ and lower	29,654		45,298
	209,767		179,071
Internal credit assessment	60,598		71,426
Total long-term term receivables	$	270,365	$	250,497

Change in Allowance for Doubtful Accounts

The following shows the change in allowance for doubtful accounts for the years ended January 31, 2014, 2013, and 2012:

Allowance for doubtful accounts	Beginning balance		Charged to expense		Other changes(1)			Ending balance
Year ended January 31, 2014	$	5,331	$	517	$	(379	)	$	5,469
Year ended January 31, 2013	$	4,432	$	1,147	$	(248	)	$	5,331
Year ended January 31, 2012	$	3,941	$	688	$	(197	)	$	4,432