Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013
Long-Term Contractual Obligations
2014	$ 20,185
2015	16,816
2016	14,091
2017	66,414
2018	1,149
Thereafter	3,663
Total	122,318
Term Loan Facility
Long-Term Contractual Obligations
Interest rate (as a percent)	2.41%
Revolving Credit Facility
Long-Term Contractual Obligations
Interest rate (as a percent)	2.50%
Maturities of the credit facilities
Long-Term Contractual Obligations
2014	10,000
2015	10,000
2016	10,000
2017	65,000
Total	95,000
Expected interest payments under the credit facilities
Long-Term Contractual Obligations
2014	2,239
2015	1,997
2016	1,756
2017	4
Total	5,996
Minimum commitments under noncancelable operating leases
Long-Term Contractual Obligations
2014	3,640
2015	2,849
2016	1,942
2017	1,294
2018	1,113
Thereafter	3,636
Total	14,474
Acquisitions payable
Long-Term Contractual Obligations
2015	45
Total	45
Compensation agreements
Long-Term Contractual Obligations
2014	4,252
2015	1,870
2016	350
2017	75
Total	6,547
Deferred compensation and other
Long-Term Contractual Obligations
2014	54
2015	55
2016	43
2017	41
2018	36
Thereafter	27
Total	$ 256