Commitments and Contingencies - Schedule of Contractual Obligations, Commitments and Contingencies (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Long-Term Debt [Member]
Commitment And Contingencies [Line Items]
Payments due in 1 year	$ 9,425
Payments due in 2 years	473
Payments due in 3 years	1,734
Payments due in 4 years	174
Payments due in 5+ years	6,305
Contractual obligations, commitments and contingencies	18,111
Operating Leases [Member]
Commitment And Contingencies [Line Items]
Payments due in 1 year	1,076
Payments due in 2 years	731
Payments due in 3 years	467
Payments due in 4 years	422
Payments due in 5+ years	30
Contractual obligations, commitments and contingencies	2,726
Interest on Outstanding Debt [Member]
Commitment And Contingencies [Line Items]
Payments due in 1 year	572
Payments due in 2 years	494
Payments due in 3 years	410
Payments due in 4 years	338
Payments due in 5+ years	3,927
Contractual obligations, commitments and contingencies	$ 5,741