Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jul. 05, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Warrant shares to be issued	3,800,000								3,800,000
Stock Repurchased During Period, Shares												3,825,554
shares repurchased from related party, price paid												$ 50,000
purchase price per shares, repurchased shares												$ 13.07
Earnings Per Share Reconciliation [Abstract]
Earnings from continuing operations	$ (755)	$ 2,116	$ 11,528	$ 8,171	$ 13,343	$ 6,347	$ 10,570	$ 8,895	$ 21,060	$ 39,155	$ 32,074
Weighted-average shares outstanding for basic earnings per share (in shares)	59,083,000	59,379,000	63,267,000	63,636,000	63,742,000	64,239,000	64,541,000	64,454,000	61,330,000	64,242,000	64,253,000
Common equivalent shares:
Effect of stock-based compensation awards (in shares)									1,664,000	885,000	958,000
Weighted-average shares outstanding assuming dilution (in shares)	59,083,000	60,283,000	66,763,000	65,057,000	64,536,000	65,171,000	65,471,000	65,337,000	62,994,000	65,127,000	65,211,000
Basic earnings per share from continuing operations (in dollars per share)	$ (0.01)	$ 0.04	$ 0.18	$ 0.13	$ 0.21	$ 0.10	$ 0.16	$ 0.14	$ 0.34	$ 0.61	$ 0.50
Diluted earnings per share from continuing operations (in dollars per share)	$ (0.01)	$ 0.04	$ 0.12	$ 0.13	$ 0.21	$ 0.10	$ 0.16	$ 0.14	$ 0.33	$ 0.60	$ 0.49
Restricted stock (in shares)									327,700	348,600	435,600
Anti-dilutive securities excluded from computation of earnings per share (in shares)									1,940,329	11,000	0
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	11,100,000								11,100,000