Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)

v2.4.1.9
CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Preferred stock, par value (usd per share) $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 1,000,000us-gaap_PreferredStockSharesAuthorized 1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common stock, par value (usd per share) $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 375,000,000us-gaap_CommonStockSharesAuthorized 375,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 80,158,022us-gaap_CommonStockSharesIssued 79,626,261us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 77,104,388us-gaap_CommonStockSharesOutstanding 76,572,627us-gaap_CommonStockSharesOutstanding
Treasury stock, shares 3,053,634us-gaap_TreasuryStockShares 3,053,634us-gaap_TreasuryStockShares
Common Stock Non-Voting    
Common stock, par value (usd per share) $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_NonvotingCommonStockMember
$ 0.0001us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_NonvotingCommonStockMember
Common stock, shares authorized 25,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_NonvotingCommonStockMember
25,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_NonvotingCommonStockMember
Common stock, shares issued 0us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_NonvotingCommonStockMember
0us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_NonvotingCommonStockMember
Common stock, shares outstanding 0us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_NonvotingCommonStockMember
0us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_NonvotingCommonStockMember