CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY, (Unaudited) - 9 months ended Sep. 30, 2018 - USD ($)	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]
Balances at Dec. 31, 2017	$ 462,211,000	$ 531,000	$ 461,680,000	$ 0
Increase (Decrease) in Stockholders' Equity
Net income	(17,988,000)	0	0	(17,988,000)
Cash dividend declared	43,648,000	0	43,648,000	0
Issuance of common shares pursuant to stock based compensation plan	258,000	0	258,000	0
Amortization of stock based compensation	151,000	0	151,000	0
Stock Repurchased and Retired During Period, Value	(7,681,000)	(11,000)	(7,670,000)	0
Balances at Sep. 30, 2018	$ 393,303,000	$ 520,000	$ 410,771,000	$ (17,988,000)