Stockholders' Equity - Common shares (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of the beginning and ending common stock outstanding
Balance, beginning of year (shares)	125,279,000
Balance, end of year (shares)	134,706,000	125,279,000
Common Stock [Member]
Reconciliation of the beginning and ending common stock outstanding
Balance, beginning of year (shares)	125,279,455	125,131,593	116,416,900
Issuance of common stock (shares)	9,251,440	26,203	8,395,607
Non-vested stock-based awards, net of withheld shares and forfeitures (shares)	175,259	121,659	319,086
Balance, end of year (shares)	134,706,154	125,279,455	125,131,593