Appointment of President (Details) (Market-based Restricted Stock Units [Member], USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2014
Market-based Restricted Stock Units [Member]
Maximum value of market-based award	$ 3.5
Granted	200,000
Weighted average grant date fair value of granted	$ 15.02
Fair value of market-based award	$ 2.3
Percent of grant price		65.70%
Amortization period for award		1 year 9 months 14 days

The weighted average fair value at grant date for nonvested equity-based awards issued 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

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration