XML 56 R1.htm IDEA: XBRL DOCUMENT v2.4.0.8
Document and Entity Information
 6 Months Ended
Oct. 31, 2014
Nov. 17, 2014
Class A Common Stock [Member]
Nov. 17, 2014
Class B Common Stock [Member]
Document Information [Line Items]      
Document Type 10-Q    
Amendment Flag false    
Document Period End Date Oct. 31, 2014    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus Q2    
Trading Symbol CWST    
Entity Registrant Name CASELLA WASTE SYSTEMS INC    
Entity Central Index Key 0000911177    
Current Fiscal Year End Date --12-31    
Entity Filer Category Accelerated Filer    
Entity Common Stock, Shares Outstanding   39,544,805 988,200