Incentive Plans (Details) In Thousands, unless otherwise specified	Mar. 31, 2014
Common stock reserved for issuance [Line Items]
Common shares reserved for issuance (in shares)	4,420
1993 Stock Incentive Plan [Member]
Common stock reserved for issuance [Line Items]
Common shares reserved for issuance (in shares)	4,320
Other employee benefit plan [Member]
Common stock reserved for issuance [Line Items]
Common shares reserved for issuance (in shares)	100

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant