Shareholders' Equity and Debt (Debt) (Details) (Credit Facility, Line of Credit, USD $)	1 Months Ended
Aug. 31, 2011 Credit Facility, Fifth Amended and Restated Loan Agreement, the Agreement, August 2011	Mar. 31, 2013 Credit Facilty, March 2013 Amendment Related to Share Repurchases
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	$ 10,000,000
Line of credit, maximum borrowing capacity upon satisfaction of certain conditions	20,000,000
Line of credit, covenant terms, value of share repurchases allowable over term of agreement	10,000,000
Line of credit, covenant terms, value of share repurchases allowable from amendment date to end of term of agreement		$ 10,000,000

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant