[["balance at january 1 2013", "$ 180993"], ["increases in current period tax positions", "27229"], ["decreases in prior period measurement of tax positions", "-30275 ( 30275 )"], ["balance at december 31 2013", "$ 177947"], ["increases in current period tax positions", "53818"], ["decreases in prior period measurement of tax positions", "-36528 ( 36528 )"], ["balance at december 31 2014", "$ 195237"]]