Issue with APEX code

OK. I've been doing this for years and suddenly I'm getting an error("expecting right curly bracket, found 'For'"). Here's the class. Can anyone tell me why I'd be getting this error for my FOR statement?

publicwithsharingclass Monthly
{
     public List<Id> lstBudId = new List<Id>();
     publicSet<Id> setBudId = newSet<Id>();

     //Get list of budget periods that are older than today
     public List<Budget_Period__c> lstCBP = new List<Budget_Period__c>
          ([SELECT ID, BUDGET__C
          FROMBudget_Period__c
          WHERE PERIOD_END_DATE__C >= TODAY]);

     For(Budget_Period__c cbp : lstCBP)
     {
          if(!setBudID.contains(cbp.Budget__c))
          {
               setBudId.add(cbp.Budget__c);
               lstBudID.add(cbp.Budget__c);
          }
     }
}