Employee Benefits (Details 1) - Restricted Shares Subject Only to a Service Condition	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Restricted shares subject only to a service condition:
Non-vested, January 1, 2015 (in shares) | shares	415,494
Granted (in shares) | shares	878,150
Vested (in shares) | shares	(186,386)
Forfeited (in shares) | shares	(9,250)
Non-vested, December 31, 2015 (in shares) | shares	1,098,008
Non-vested, January 1, 2015 (in dollars per share) | $ / shares	$ 26.29
Granted (in dollars per share) | $ / shares	13.26
Vested (in dollars per share) | $ / shares	28.32
Forfeited (in dollars per share) | $ / shares	30.42
Non-vested, December 31, 2015 (in dollars per share) | $ / shares	$ 15.49