CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 55,130	$ 71,438	$ 62,247
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment	26,459	16,861	16,621
Amortization of intangible assets	5,933	5,471	5,583
Amortization of operating lease right of use assets	1,215	0	0
Share-based compensation - liability awards	0	(3,166)	16,133
Share-based compensation - equity awards	3,826	1,692	1,658
Amortization of debt financial costs and discounts on debt	2,684	3,267	3,287
Loss on extinguishment and modification of debt	1,703	0	0
Bad debt expense	239	202	29
Net pension and other post-retirement benefit income	(39)	0	0
Deferred income taxes	8,995	5,880	(5,126)
Newport Grand disposal loss	0	6,514	0
Loss on disposal of property and equipment	98	11	24
Changes in operating assets and liabilities:
Accounts receivable	5,211	(4,857)	(870)
Inventory	(89)	842	(461)
Prepaid expenses and other assets	(14,172)	(1,778)	4,547
Accounts payable	(3,860)	(4,078)	1,155
Accrued liabilities	767	10,945	3,005
Net cash provided by operating activities	94,100	109,244	107,832
Cash flows from investing activities:
Deposit paid	0	(981)	0
Repayment of loans from officers and directors	0	5,360	362
Acquisition of Dover Downs Gaming & Entertainment, Inc., net of cash acquired	(9,606)	0	0
Proceeds from sale of land and building for Newport Grand disposal	0	7,108	0
Proceeds from sale of property and equipment	10	11	6
Capital expenditures, excluding Tiverton Casino Hotel and new hotel at Twin River Casino	(22,582)	(11,874)	(8,574)
Capital expenditures - Tiverton Casino Hotel	(1,855)	(94,581)	(34,355)
Capital expenditures - new hotel at Twin River Casino	(3,800)	(22,435)	(4,924)
Payments associated with licenses	(1,092)	(208)	0
Net cash used in investing activities	(38,925)	(117,600)	(47,485)
Cash flows from financing activities:
Revolver borrowings	25,000	41,000	10,000
Revolver repayments	(80,000)	(6,000)	(25,000)
Term loan proceeds, net of fees of $10,655	289,345	0	0
Term loan repayments	(343,939)	(34,527)	(11,564)
Senior note proceeds, net of fees of $6,130	393,870	0	0
Payment of financing fees	(4,340)	(221)	(373)
Share repurchases (including tender offer)	(223,075)	(7,958)	(2,275)
Stock options exercised via repayment of non-recourse notes	0	4,277	280
Stock options exercised	0	0	237
Stock options put	0	0	(238)
Payment of shareholder dividends	(7,539)	0	0
Share redemption for tax withholdings - restricted stock	(426)	0	0
Net cash provided by (used in) financing activities	48,896	(3,429)	(28,933)
Net change in cash and cash equivalents and restricted cash	104,071	(11,785)	31,414
Cash and cash equivalents and restricted cash, beginning of period	81,431	93,216	61,802
Cash and cash equivalents and restricted cash, end of period	185,502	81,431	93,216
Supplemental disclosure of cash flow information:
Cash paid for interest	35,040	23,178	20,067
Cash paid for income taxes	16,519	22,217	41,029
Non-cash investing and financing activities:
Unpaid property and equipment	419	7,073	24,858
Deposit applied to fixed asset purchases	981	0	0
Deemed dividends related to changes in fair value of common stock subject to possible redemption	0	(640)	2,344
Intrinsic value of stock options exercised via repayment of non-recourse note	0	40,480	1,995
Intrinsic value of stock options exercised with cash	0	0	1,151
Termination of operating leases via purchase of underlying assets	1,665	0	0
Common stock no longer subject to possible redemption due to extinguishment of Puts	0	9,098	0
Fair value of vested stock options converted from liability to equity awards	0	2,875	0
Stock issued for acquisition of Dover Downs Gaming & Entertainment, Inc.	$ 86,780	$ 0	$ 0