Summary of Significant Accounting Policies - Estimated Amortization Expense of Deferred Financing Costs (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Estimated amortization expense of deferred financing
2014	$ 198
2015	198
2016	198
2017	198
2018	$ 15

Deferred financing costs amortization expense next twelve months.

No definition available.

Name:	dest_DeferredFinancingCostsAmortizationExpenseNextTwelveMonths
Namespace Prefix:	dest_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant