CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Cash flows from operating activities:      
Net income $ 43,636 $ 41,726 $ 37,951
Adjustments to reconcile net income to cash provided by operating activities:      
Depreciation and amortization 61,856 35,491 11,675
Amortization of deferred loan costs 2,246 1,458 560
Unit-based compensation 3,016 1,876 3,440
Loss on asset sales 113 0 0
Pay-in-kind interest on promissory notes payable to Sponsors 0 5,426 2,025
Changes in operating assets and liabilities:      
Accounts receivable (15,147) (6,028) (17,238)
Due to/from affiliate 1,427 (774) 0
Trade accounts payable (1,992) (2,164) 2,468
Change in deferred revenue 16,685 9,994 0
Ad valorem taxes payable 1,264 3,072 0
Accrued interest 12,128 (484) 500
Other, net 725 (105) (1,439)
Net cash provided by operating activities 125,957 89,488 39,942
Cash flows from investing activities:      
Capital expenditures (81,911) (76,698) (78,248)
Proceeds from asset sales 585 0 0
Acquisition of gathering systems (210,000) 0 (589,462)
Acquisition of gathering system from affiliate (200,000) 0 0
Net cash used in investing activities (491,326) (76,698) (667,710)
Cash flows from financing activities:      
Distributions to unitholders (90,196) 0 0
Borrowings under revolving credit facility 380,950 213,000 147,000
Repayments under revolving credit facility (294,180) (160,770) 0
Issuance of senior notes 300,000 0 0
Contribution from SMP Holdings to Bison Midstream 2,229 0 0
Issuance of units to affiliate in connection with the Mountaineer Acquisition 100,000 0 0
Proceeds from issuance of units 0 263,125 0
Repurchase of DFW Net Profits Interests (11,957) 0 0
Deferred loan costs (10,608) (3,344) (5,248)
Repayment of promissory notes payable to Sponsors 0 (209,230) 200,000
Distributions to Sponsors 0 (123,138) (132,943)
Contributions from Sponsors 0 0 425,000
Net cash provided by (used in) financing activities 376,238 (20,357) 633,809
Net change in cash and cash equivalents 10,869 (7,567) 6,041
Cash and cash equivalents, beginning of period 7,895 15,462 9,421
Cash and cash equivalents, end of period 18,764 7,895 15,462
Supplemental Cash Flow Disclosures:      
Cash interest paid 9,016 8,283 2,463
Less: capitalized interest 4,209 2,784 3,362
Interest paid (net of capitalized interest) 4,807 5,499 (899)
Cash paid for income taxes 660 650 223
Noncash Investing and Financing Activities:      
Capital expenditures in trade accounts payable (period-end accruals) 10,245 7,829 11,332
Issuance of units to affiliate to partially fund the Bison Drop Down 48,914 0 0
Contribution of net assets from SMP Holdings in excess of consideration paid for Bison Midstream 56,535 0 0
Pay-in-kind interest on promissory notes payable to Sponsors 0 6,337 2,893
Net assets retained by the Predecessor 0 4,417 0
Deferred initial public offering costs in trade accounts payable 0 743 0
Working capital acquired related to Grand River system acquisition $ 0 $ 0 $ 854