Commitments and Contingencies - Schedule of Contractual Obligations, Commitments and Contigencies (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014
Long-Term Debt [Member]
Commitment And Contingencies [Line Items]
Payments due in 1 year	$ 5,367
Payments due in 2 years	776
Payments due in 3 years	812
Payments due in 4 years	1,847
Payments due in 5 years	629
Payments due in 6+ years	7,778
Contractual obligations, commitments and contingencies	17,209
Operating Leases [Member]
Commitment And Contingencies [Line Items]
Payments due in 1 year	1,208
Payments due in 2 years	471
Payments due in 3 years	330
Payments due in 4 years	133
Payments due in 5 years	24
Payments due in 6+ years	8
Contractual obligations, commitments and contingencies	2,174
Interest on Outstanding Debt [Member]
Commitment And Contingencies [Line Items]
Payments due in 1 year	950
Payments due in 2 years	723
Payments due in 3 years	669
Payments due in 4 years	567
Payments due in 5 years	480
Payments due in 6+ years	2,654
Contractual obligations, commitments and contingencies	$ 6,043