Related-Party Transactions	12 Months Ended
Dec. 31, 2015
Related Party Transactions [Abstract]
Related-Party Transactions	16. RELATED-PARTY TRANSACTIONS As of December 31, 2015, approximately $77,000 aggregate principal amount of Term B-2 Loans and $9,000 aggregate principal amount of Term B-3 Loans were owned by affiliates of Blackstone. As of December 31, 2014, approximately $65,000 aggregate principal amount of the Senior Notes and approximately $87,000 aggregate principal amount of Term B-2 Loans were owned by affiliates of Blackstone. The Company makes voluntary principal repayments as well as periodic principal and interest payments on such debt in accordance with its terms. On April 7, 2015, the Senior Notes were redeemed as discussed in Note 11–Long-Term Debt. Dividend Payments On January 5, 2016, the Company’s Board of Directors (the “Board”) declared a cash dividend of $0.21 per share to all common stockholders of record at the close of business on January 15, 2016, which was paid on January 22, 2016. In connection with this dividend declaration, certain affiliates of Blackstone were paid dividends in the amount of $4,095. On February 22, 2016, the Board declared a cash dividend of $0.21 per share to all common stockholders of record at the close of business on March 14, 2016, which will be paid on April 1, 2016. In connection with this dividend declaration, certain affiliates of Blackstone are estimated to receive dividends. On January 5, March 3, June 10, and September 16, 2015, the Board declared a cash dividend of $0.21 per share to all common stockholders of record at the close of business on January 13, March 13, June 22, and September 29, 2015, respectively (see Note 19–Stockholders’ Equity). In connection with these dividend declarations, certain affiliates of Blackstone were paid dividends in the amount of $4,095 on January 22, April 1, July 1, and October 6, 2015. In March 2014, the Board declared a cash dividend of $0.20 per share to all common stockholders of record at the close of business on March 20, 2014. In May and September 2014, the Board declared a cash dividend of $0.21 per share to all common stockholders of record at the close of business on June 20 and September 29, 2014, respectively (see Note 19–Stockholders’ Equity). In connection with these dividend declarations, certain affiliates of Blackstone were paid dividends in the amount of $7,849, $4,252 and $4,095 on April 1, July 1, and October 6, 2014, respectively. In June, September and December 2013, the Board declared a cash dividend of $0.20 per share to all common stockholders of record at the close of business on June 20, September 20 and December 20, 2013, respectively (see Note 19–Stockholders’ Equity). In connection with these dividend declarations, certain affiliates of Blackstone were paid dividends in the amount of $11,749, $11,749 and $7,849, on July 1, 2013, October 1, 2013, and January 3, 2014, respectively. Share Repurchases The Company repurchased shares of its common stock from the selling stockholders concurrently with the closing of the respective secondary offerings in December 2013 and April 2014. See further discussion in Note 19–Stockholders’ Equity. Advisory Agreement Prior to April 2013, certain affiliates of Blackstone provided monitoring, advisory and consulting services to the Company under an advisory fee agreement (the “2009 Advisory Agreement”), which was terminated on April 24, 2013 in connection with the completion of the initial public offering (see Note 19–Stockholders’ Equity). Fees related to these services, which were based upon a multiple of Adjusted EBITDA as defined in the 2009 Advisory Agreement, amounted to $2,799 for the year ended December 31, 2013. These fees are included in selling, general and administrative expenses in the accompanying consolidated statements of comprehensive income. There were no fees related to these services in the years ended December 31, 2015 or 2014 due to the termination of the 2009 Advisory Agreement in April 2013. In connection with the completion of the initial public offering in April 2013 (see Note 19–Stockholders’ Equity), the 2009 Advisory Agreement between the Company and affiliates of Blackstone was terminated (except for certain provisions relating to indemnification and certain other provisions, which survived termination). In connection with such termination, the Company paid a termination fee of $46,300 to Blackstone using a portion of the net proceeds from the offering and wrote off $3,772 of the 2013 prepaid advisory fee. The combined expense of $50,072 was recorded as termination of advisory agreement during the year ended December 31, 2013 in the accompanying consolidated statements of comprehensive income.

16. RELATED-PARTY TRANSACTIONS

As of December 31, 2015, approximately $77,000 aggregate principal amount of Term B-2 Loans and $9,000 aggregate principal amount of Term B-3 Loans were owned by affiliates of Blackstone. As of December 31, 2014, approximately $65,000 aggregate principal amount of the Senior Notes and approximately $87,000 aggregate principal amount of Term B-2 Loans were owned by affiliates of Blackstone. The Company makes voluntary principal repayments as well as periodic principal and interest payments on such debt in accordance with its terms. On April 7, 2015, the Senior Notes were redeemed as discussed in Note 11–Long-Term Debt.

Dividend Payments

On January 5, 2016, the Company’s Board of Directors (the “Board”) declared a cash dividend of $0.21 per share to all common stockholders of record at the close of business on January 15, 2016, which was paid on January 22, 2016. In connection with this dividend declaration, certain affiliates of Blackstone were paid dividends in the amount of $4,095. On February 22, 2016, the Board declared a cash dividend of $0.21 per share to all common stockholders of record at the close of business on March 14, 2016, which will be paid on April 1, 2016. In connection with this dividend declaration, certain affiliates of Blackstone are estimated to receive dividends.

On January 5, March 3, June 10, and September 16, 2015, the Board declared a cash dividend of $0.21 per share to all common stockholders of record at the close of business on January 13, March 13, June 22, and September 29, 2015, respectively (see Note 19–Stockholders’ Equity). In connection with these dividend declarations, certain affiliates of Blackstone were paid dividends in the amount of $4,095 on January 22, April 1, July 1, and October 6, 2015.

In March 2014, the Board declared a cash dividend of $0.20 per share to all common stockholders of record at the close of business on March 20, 2014. In May and September 2014, the Board declared a cash dividend of $0.21 per share to all common stockholders of record at the close of business on June 20 and September 29, 2014, respectively (see Note 19–Stockholders’ Equity). In connection with these dividend declarations, certain affiliates of Blackstone were paid dividends in the amount of $7,849, $4,252 and $4,095 on April 1, July 1, and October 6, 2014, respectively.

In June, September and December 2013, the Board declared a cash dividend of $0.20 per share to all common stockholders of record at the close of business on June 20, September 20 and December 20, 2013, respectively (see Note 19–Stockholders’ Equity). In connection with these dividend declarations, certain affiliates of Blackstone were paid dividends in the amount of $11,749, $11,749 and $7,849, on July 1, 2013, October 1, 2013, and January 3, 2014, respectively.

Share Repurchases

The Company repurchased shares of its common stock from the selling stockholders concurrently with the closing of the respective secondary offerings in December 2013 and April 2014. See further discussion in Note 19–Stockholders’ Equity.

Advisory Agreement

Prior to April 2013, certain affiliates of Blackstone provided monitoring, advisory and consulting services to the Company under an advisory fee agreement (the “2009 Advisory Agreement”), which was terminated on April 24, 2013 in connection with the completion of the initial public offering (see Note 19–Stockholders’ Equity). Fees related to these services, which were based upon a multiple of Adjusted EBITDA as defined in the 2009 Advisory Agreement, amounted to $2,799 for the year ended December 31, 2013. These fees are included in selling, general and administrative expenses in the accompanying consolidated statements of comprehensive income. There were no fees related to these services in the years ended December 31, 2015 or 2014 due to the termination of the 2009 Advisory Agreement in April 2013.

In connection with the completion of the initial public offering in April 2013 (see Note 19–Stockholders’ Equity), the 2009 Advisory Agreement between the Company and affiliates of Blackstone was terminated (except for certain provisions relating to indemnification and certain other provisions, which survived termination). In connection with such termination, the Company paid a termination fee of $46,300 to Blackstone using a portion of the net proceeds from the offering and wrote off $3,772 of the 2013 prepaid advisory fee. The combined expense of $50,072 was recorded as termination of advisory agreement during the year ended December 31, 2013 in the accompanying consolidated statements of comprehensive income.