Commitments and Contingencies - Future Minimum Commitments under Non-Cancelable Operating Leases with Initial or Remaining Terms of One Year or More (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014
Leases [Abstract]
2014	$ 2,452
2015	1,706
2016	1,154
2017	791
2018	429
Thereafter	1,235
Future minimum lease payments	$ 7,767