Stockholders' Equity - Common shares (Details) - shares		12 Months Ended
	Jul. 05, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of the beginning and ending common stock outstanding
Balance, beginning of year (shares)		101,517,000
Issuance of common stock (shares)	9,200,000
Balance, end of year (shares)		116,417,000	101,517,000
Common Stock [Member]
Reconciliation of the beginning and ending common stock outstanding
Balance, beginning of year (shares)		101,517,009	98,828,098	95,924,339
Issuance of common stock (shares)		14,063,100	2,493,171	3,073,445
Non-vested stock-based awards, net of withheld shares and forfeitures (shares)		836,791	195,740	(169,686)
Balance, end of year (shares)		116,416,900	101,517,009	98,828,098