XML 23 R57.htm IDEA: XBRL DOCUMENT v2.4.1.9
Employee Share-Based Compensation Plans - Summary of Share-Based Compensation Expense (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total share-based compensation expense $ 1,512us-gaap_AllocatedShareBasedCompensationExpense $ 1,469us-gaap_AllocatedShareBasedCompensationExpense $ 1,419us-gaap_AllocatedShareBasedCompensationExpense
Project and Personnel Costs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total share-based compensation expense 242us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= edgw_ProjectAndPersonnelCostsMember		 276us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= edgw_ProjectAndPersonnelCostsMember		 366us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= edgw_ProjectAndPersonnelCostsMember
Selling, General and Administrative [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total share-based compensation expense $ 1,270us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember		 $ 1,193us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember		 $ 1,053us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember