The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Subsequent events (Details) (RSUs)	12 Months Ended		0 Months Ended
Subsequent events (Details) (RSUs)	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2015
Subsequent events
Issued (in shares)	1,650,000	799,000
Subsequent Event \| Executive and non executive personnel
Subsequent events
Issued (in shares)			1,264,608