XML 20 R28.htm IDEA: XBRL DOCUMENT v2.4.0.8

Acquisitions (Details)	3 Months Ended	12 Months Ended
Acquisitions (Details)	Mar. 31, 2014 item	Dec. 31, 2013 item
Acquisitions
Number of acquisitions	1	0

Name:	us-gaap_BusinessCombinationsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The number of businesses acquired by the entity during the period.

No definition available.

Name:	us-gaap_NumberOfBusinessesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration