Stockholders' Equity - Reconciliation of beginning and ending common stock outstanding (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Reconciliation of the beginning and ending common stock outstanding
Balance, end of period	96,038,000	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	95,924,339
Issuance of common stock	22,101	8,293,369
Nonvested share-based awards, net	91,548	116,634
Balance, end of period	96,037,988	95,924,339	95,924,339