General (Details 2) (Reduction in estimated bonus, USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2012
Reduction in estimated bonus
Change in estimates
Reduction in estimated bonus	$ 1.1
Increase in income from continuing operations	0.6
Increase in net income	$ 0.6
Increase in diluted earnings per share	$ 0.02

Represents the increase (decrease) in net income from continuing operations from specified adjustments.

No definition available.

Name:	dgit_IncreaseDecreaseNetIncomeFromContinuingOperations
Namespace Prefix:	dgit_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration