Equity - Reconciliation of beginning and ending common stock outstanding (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Reconciliation of the beginning and ending common stock outstanding
Balance, end of period	97,172,000	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	1,136,006	8,293,369
Nonvested share-based awards, net	112,029	116,634
Balance, end of period	97,172,374	95,924,339