|
EARNINGS PER UNIT (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
|
12 Months Ended |
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
| Net income |
$ 43,636 |
$ 41,726 |
$ 37,951 |
| Less: net income attributable to the pre-IPO period |
0 |
24,112 |
|
| Less: net income attributable to SMP Holdings |
52 |
0 |
|
| Net income attributable to SMLP |
43,584 |
17,614 |
|
| Less: net income attributable to general partner, including IDRs |
1,035 |
352 |
|
| Net income attributable to limited partners |
42,549 |
17,262 |
|
| Weighted-average common units outstanding – basic (in units) |
26,951,346 |
24,412,427 |
|
| Less: effect of non-vested phantom units and non-vested restricted units (in units) |
150,133 |
131,558 |
|
| Weighted-average common units outstanding – diluted (in units) |
27,101,479 |
24,543,985 |
|
| Weighted-average subordinated units outstanding – basic and diluted (in units) |
24,409,850 |
24,409,850 |
|
| Earnings per common unit – basic (in dollars per unit) |
$ 0.86 |
$ 0.35 |
|
| Earnings per common unit – diluted (in dollars per unit) |
$ 0.86 |
$ 0.35 |
|
| Earnings per subordinated unit – basic and diluted (in dollars per unit) |
$ 0.79 |
$ 0.35 |
|
|
Limited partners, Common
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
| Net income |
22,311 |
8,631 |
|
| Net income attributable to limited partners |
23,227 |
8,632 |
|
|
Subordinated units
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
| Net income attributable to limited partners |
$ 19,322 |
$ 8,630 |
|