Earnings Per Share (Schedule of Basic and diluted EPS) (Details)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Weighted-average shares for basic EPS (in shares)	102,928,952	96,082,012	93,285,406
Plus incremental shares related to stock options and warrants (in shares)	63,554	249,369	88,622
Weighted-average shares for diluted EPS (in shares)	102,992,506	96,331,381	93,374,028

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 55

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2626-109256

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 48

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2538-109256

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingently Issuable Shares

-URI http://asc.fasb.org/extlink&oid=6508586

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