The following is a roll-forward of assets in Level 3 of the fair value hierarchy (in thousands): Of the $21.4 million in plan assets classified as Level 3, $12.1 million was invested in real estate, while $8.2 million was invested in collective  investment funds. The fair values by asset category in each plan, along with their hierarchy levels, were as follows as of December 31, 2011 (in thousands):  The following is a roll-forward of assets in Level 3 of the fair value hierarchy (in thousands): Of the $16.9 million reported as level 3 assets above, $8.2 million was comprised of real estate funds, while the remainder was invested in common  collective funds. Generally, investments are valued based on information provided by fund managers to our trustee as reviewed by management and its investment  advisers. Mutual funds and equities are valued based on available exchange data. Commingled equity funds consist of publicly-traded investments.  Fair value for real estate and private equity partnerships is primarily based on valuation methodologies that include third-party appraisals, comparable  transactions, and discounted cash flow valuation models. Future benefit payments, which reflect expected future service as appropriate, are estimates of what will be paid in the following years (in  thousands):  We expect to contribute approximately $1.0 million to our funded pension plans and $0.3 million related to our unfunded supplemental executive  retirement plan during 2013. The following table describes plans for which accumulated benefit obligations (“ABO”) were in excess of plan assets, and for which plan assets  exceeded ABO (in thousands). Hecla  Lucky Friday Beginning balance at December 31, 2011 $ 13,300 $ 3,566 Net unrealized gains on assets held at the reporting date  838  187  Purchases 2,724  738  Ending balance at December 31, 2012  $ 16,862  $ 4,491  Hecla  Lucky Friday  Level 1 Level 2 Level 3  Total Level 1 Level 2 Level 3 Total Interest-bearing cash $ 609 $ — $ — $ 609 $ 166 $ — $ — $ 166 Common stock 2,071 — — 2,071 527 — — 527 Real estate — — 6,497 6,497 — — 1,709 1,709 Common collective funds — 12,641 6,803 19,444 — 3,310 1,857 5,167 Mutual funds  22,667  —  —  22,667  6,225  —  —  6,225  Total fair value  $ 25,347  $ 12,641  $ 13,300  $ 51,288  $ 6,918  $ 3,310  $ 3,566  $ 13,794  Hecla  Lucky Friday Beginning balance at December 31, 2010 $ 12,508 $ 3,356 Net unrealized gains on assets held at the reporting date  391  104  Purchases 401  106  Ending balance at December 31, 2011  $ 13,300  $ 3,566   Other Post- Pension Employment Year Ending December 31,  Plans Benefit Plans 2013  $ 4,769 $ 3 2014  4,951 8 2015  5,083 6 2016  5,320 8 2017  5,601 7 Years 2018-2022 34,011 26 December 31, 2012  December 31, 2011  ABO Exceeds  Plan Assets  ABO Exceeds  Plan Assets  Plan Assets  Exceed ABO  Plan Assets  Exceed ABO Projected benefit obligation $ 99,367 $ — $ 87,895 $ — Accumulated benefit obligation 92,590 — 81,018 — Fair value of plan assets 68,515 — 65,082 — F-20 [ HL:10-K ] 