Condensed Consolidating Financial Information (Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents, end of period	$ 120,910	$ 177,838	$ 165,803	$ 165,803	$ 192,545
Other Assets, Current	109,541	156,842
Property and equipment, net	2,278,854	3,505,613
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	221,400	0
Interest Receivable	0	0
Other Noncurrent Assets	110,656	145,468
Intangible assets, net	982,910	1,070,660
Goodwill, net	685,310	685,310
Total assets	4,509,581	5,741,731
Liabilities and Stockholders’ Equity
Current maturities of long-term debt	27,693	33,559
Current liabilities	322,594	420,304
Accumulated losses of subsidiaries in excess of investment	0	0
Intercompany payable	0	0
Long-term debt, net of current maturities	3,432,725	4,352,932
Other long-term liabilities	263,962	284,499
Common stock	1,084	1,082
Additional paid-in capital	914,391	902,496
Retained earnings (deficit)	(452,692)	(432,074)
Accumulated other comprehensive income (loss)	(226)	(1,517)
Total Boyd Gaming Corporation stockholders’ equity	462,557	469,987
Noncontrolling interest	50	180,450	200,701		163,336
Total stockholders’ equity	462,607	650,437	710,472		467,127
Total liabilities and stockholders’ equity	4,509,581	5,741,731
Parent
Assets
Cash and cash equivalents, end of period	2	0		0	2,520
Other Assets, Current	7,391	13,772
Property and equipment, net	56,617	69,309
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	3,340,711	3,265,579
Interest Receivable	0	0
Other Noncurrent Assets	37,872	43,470
Intangible assets, net	0	0
Goodwill, net	0	0
Total assets	3,442,593	3,392,130
Liabilities and Stockholders’ Equity
Current maturities of long-term debt	21,500	21,500
Current liabilities	52,748	57,156
Accumulated losses of subsidiaries in excess of investment	0	0
Intercompany payable	672,643	512,358
Long-term debt, net of current maturities	2,193,920	2,285,910
Other long-term liabilities	39,225	45,219
Common stock	1,084	1,082
Additional paid-in capital	914,391	902,496
Retained earnings (deficit)	(452,692)	(432,074)
Accumulated other comprehensive income (loss)	(226)	(1,517)
Total Boyd Gaming Corporation stockholders’ equity	462,557	469,987
Noncontrolling interest	0	0
Total stockholders’ equity	462,557	469,987
Total liabilities and stockholders’ equity	3,442,593	3,392,130
Guarantor Subsidiaries
Assets
Cash and cash equivalents, end of period	91,028	106,445		99,487	118,714
Other Assets, Current	73,633	67,991
Property and equipment, net	1,773,400	1,808,450
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	177,048	129,692
Interest Receivable	1,644,006	1,474,412
Other Noncurrent Assets	6,638	8,105
Intangible assets, net	463,910	465,259
Goodwill, net	212,794	212,794
Total assets	4,442,457	4,273,148
Liabilities and Stockholders’ Equity
Current maturities of long-term debt	0	0
Current liabilities	190,007	186,539
Accumulated losses of subsidiaries in excess of investment	0	0
Intercompany payable	0	0
Long-term debt, net of current maturities	0	0
Other long-term liabilities	180,754	178,764
Common stock	31,124	31,124
Additional paid-in capital	2,717,796	2,736,895
Retained earnings (deficit)	1,323,001	1,139,826
Accumulated other comprehensive income (loss)	(225)	0
Total Boyd Gaming Corporation stockholders’ equity	4,071,696	3,907,845
Noncontrolling interest	0	0
Total stockholders’ equity	4,071,696	3,907,845
Total liabilities and stockholders’ equity	4,442,457	4,273,148
Non-Guarantor Subsidiaries (100% Owned)
Assets
Cash and cash equivalents, end of period	29,661	33,766		30,866	36,619
Other Assets, Current	30,061	28,639
Property and equipment, net	448,837	460,789
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0	0
Interest Receivable	0	0
Other Noncurrent Assets	66,146	72,185
Intangible assets, net	519,000	545,401
Goodwill, net	472,516	472,516
Total assets	1,566,221	1,613,296
Liabilities and Stockholders’ Equity
Current maturities of long-term debt	6,193	8,259
Current liabilities	80,349	70,678
Accumulated losses of subsidiaries in excess of investment	228	2,026
Intercompany payable	971,726	966,128
Long-term debt, net of current maturities	1,238,805	1,269,562
Other long-term liabilities	43,983	33,297
Common stock	(27)	(27)
Additional paid-in capital	248,203	248,083
Retained earnings (deficit)	(1,023,014)	(983,193)
Accumulated other comprehensive income (loss)	(225)	(1,517)
Total Boyd Gaming Corporation stockholders’ equity	(775,063)	(736,654)
Noncontrolling interest	0	0
Total stockholders’ equity	(775,063)	(736,654)
Total liabilities and stockholders’ equity	1,566,221	1,613,296
Non-Guarantor Subsidiaries (Not 100% Owned)
Assets
Cash and cash equivalents, end of period	219	37,627		35,450	34,692
Other Assets, Current	0	48,414
Property and equipment, net	0	1,167,065
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0	0
Interest Receivable	0	0
Other Noncurrent Assets	0	21,708
Intangible assets, net	0	60,000
Goodwill, net	0	0
Total assets	219	1,334,814
Liabilities and Stockholders’ Equity
Current maturities of long-term debt	0	3,800
Current liabilities	0	103,833
Accumulated losses of subsidiaries in excess of investment	0	0
Intercompany payable	363	265
Long-term debt, net of current maturities	0	797,460
Other long-term liabilities	0	27,219
Common stock	0	0
Additional paid-in capital	4,250	480,833
Retained earnings (deficit)	(4,394)	(78,596)
Accumulated other comprehensive income (loss)	0	0
Total Boyd Gaming Corporation stockholders’ equity	(144)	402,237
Noncontrolling interest	0	0
Total stockholders’ equity	(144)	402,237
Total liabilities and stockholders’ equity	219	1,334,814
Eliminations
Assets
Cash and cash equivalents, end of period	0	0		0	0
Other Assets, Current	(1,544)	(1,974)
Property and equipment, net	0	0
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	(3,296,359)	(3,395,271)
Interest Receivable	(1,644,006)	(1,474,412)
Other Noncurrent Assets	0	0
Intangible assets, net	0	0
Goodwill, net	0	0
Total assets	(4,941,909)	(4,871,657)
Liabilities and Stockholders’ Equity
Current maturities of long-term debt	0	0
Current liabilities	(510)	2,098
Accumulated losses of subsidiaries in excess of investment	(228)	(2,026)
Intercompany payable	(1,644,732)	(1,478,751)
Long-term debt, net of current maturities	0	0
Other long-term liabilities	0	0
Common stock	(31,097)	(31,097)
Additional paid-in capital	(2,970,249)	(3,465,811)
Retained earnings (deficit)	(295,593)	(78,037)
Accumulated other comprehensive income (loss)	450	1,517
Total Boyd Gaming Corporation stockholders’ equity	(3,296,489)	(3,573,428)
Noncontrolling interest	50	180,450
Total stockholders’ equity	(3,296,439)	(3,392,978)
Total liabilities and stockholders’ equity	$ (4,941,909)	$ (4,871,657)