Equity - Reconciliation of beginning and ending common stock outstanding (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Reconciliation of the beginning and ending common stock outstanding
Balance, end of period	98,119,000	95,924,000
Common Stock [Member]
Reconciliation of the beginning and ending common stock outstanding
Balance, beginning of period	95,924,339	87,514,336
Issuance of common stock	2,149,976	8,293,369
Nonvested share-based awards, net	44,231	116,634
Balance, end of period	98,118,546	95,924,339