Stockholders' Equity | Stockholders' Equity The following table provides a reconciliation of total stockholders' equity for the three months ended March 31, 2016 : (Dollars in thousands, except per share data) Common Additional Accumulated Cumulative Cumulative Total Balance at December 31, 2015 $ 1,015 $ 2,461,376 $ (1,569 ) $ 909,685 $ (2,127,760 ) $ 1,242,747 Issuance of common stock 24 70,202 — — — 70,226 Common stock redemptions — (393 ) — — — (393 ) Stock-based compensation 3 1,945 — — — 1,948 Net income — — — 9,156 — 9,156 Reclassification of loss on forward starting interest rate swaps — — 42 — — 42 Dividends to common stockholders ($0.30 per share) — — — — (30,727 ) (30,727 ) Balance at March 31, 2016 $ 1,042 $ 2,533,130 $ (1,527 ) $ 918,841 $ (2,158,487 ) $ 1,292,999 Common Stock The following table provides a reconciliation of the beginning and ending shares of common stock outstanding for the three months ended March 31, 2016 and the year ended December 31, 2015: March 31, 2016 December 31, 2015 Balance, beginning of period 101,517,009 98,828,098 Issuance of common stock 2,446,136 2,493,171 Nonvested share-based awards, net 286,328 195,740 Balance, end of period 104,249,473 101,517,009 At-The-Market Equity Offering Program On February 19, 2016, the Company entered into sales agreements with five investment banks to allow sales under its at-the-market equity offering program of up to 10,000,000 shares of common stock. A previous sales agreement with one investment bank was terminated effective February 17, 2016. During the three months ended March 31, 2016 , the Company sold a total of 2,416,837 shares of common stock, including 664,298 shares of common stock under the previous sales agreement. The sales generated $69.7 million in net proceeds at prices ranging from $28.31 to $30.16 per share (weighted average of $29.29 per share). In April 2016, the Company sold 564,410 shares of common stock, generating $17.0 million in net proceeds at prices ranging from $30.11 to $30.82 per share (weighted average of $30.57 per share). The Company has 7,683,051 authorized shares remaining available to be sold under the current sales agreements as of April 29, 2016 . Common Stock Dividends During the three months ended March 31, 2016 , the Company declared and paid common stock dividends totaling $0.30 per share. On May 3, 2016 , the Company declared a quarterly common stock dividend in the amount of $0.30 per share payable on May 31, 2016 to stockholders of record on May 16, 2016 . Accumulated Other Comprehensive Income (Loss) The following table represents the changes in balances of each component and the amounts reclassified out of accumulated other comprehensive income (loss) related to the Company during the three months ended March 31, 2016 and 2015 : Forward-starting Interest Rate Swaps Defined Benefit Pension Plan (Dollars in thousands) 2016 2015 2016 2015 Beginning balance $ (1,569 ) $ — $ — $ (2,519 ) Other comprehensive income (loss) before reclassifications — (723 ) — — Amounts reclassified from accumulated other comprehensive loss 42 — — — Net accumulated other comprehensive income (loss) 42 (723 ) — — Ending balance $ (1,527 ) $ (723 ) $ — $ (2,519 ) Earnings Per Common Share The following table sets forth the computation of basic and diluted earnings per common share for the three months ended March 31, 2016 and 2015 . Three Months Ended March 31, (Dollars in thousands, except per share data) 2016 2015 Weighted average Common Shares outstanding Weighted average Common Shares outstanding 102,634,273 99,467,804 Nonvested shares (1,202,185 ) (1,107,846 ) Weighted average Common Shares outstanding—Basic 101,432,088 98,359,958 Weighted average Common Shares outstanding—Basic 101,432,088 98,359,958 Dilutive effect of restricted stock 601,509 615,511 Dilutive effect of employee stock purchase plan 131,221 161,428 Weighted average Common Shares outstanding—Diluted 102,164,818 99,136,897 Net Income (Loss) Income from continuing operations $ 9,163 $ 5,049 Discontinued operations (7 ) 333 Net income $ 9,156 $ 5,382 Basic Earnings Per Common Share Income from continuing operations $ 0.09 $ 0.05 Discontinued operations 0.00 0.00 Net income $ 0.09 $ 0.05 Diluted Earnings Per Common Share Income from continuing operations $ 0.09 $ 0.05 Discontinued operations 0.00 0.00 Net income $ 0.09 $ 0.05 Incentive Plans A summary of the activity under the stock-based incentive plans for the three months ended March 31, 2016 and 2015 is included in the table below. Three Months Ended March 31, 2016 2015 Stock-based awards, beginning of period 1,092,262 1,057,732 Granted 300,206 89,068 Vested (65,722 ) (28,386 ) Stock-based awards, end of period 1,326,746 1,118,414 During the three months ended March 31, 2016 and 2015 , the Company withheld 13,878 and 7,282 shares of common stock, respectively, from participants to pay estimated withholding taxes related to shares that vested. In addition to the stock-based incentive plans, the Company provides the 2000 Employee Stock Purchase Plan (the "Purchase Plan"). A summary of the activity under the Purchase Plan for the three months ended March 31, 2016 and 2015 is included in the table below. Three Months Ended March 31, 2016 2015 Outstanding and exercisable, beginning of period 340,958 393,902 Granted 198,450 197,640 Exercised (26,689 ) (33,046 ) Forfeited (7,682 ) (20,779 ) Expired (143,082 ) (158,946 ) Outstanding and exercisable, end of period 361,955 378,771 |