Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Significant Accounting Policies [Abstract]

Costs and Estimated Earnings in Excess of Billings

	As of December 31,
(in thousands)	2015		2014
Claims	$	407,164	$	311,949
Unapproved change orders		270,019		161,375
Other unbilled costs and profits		227,992		253,078
Total costs and estimated earnings in excess of billings	$	905,175	$	726,402

Calculations of Basic and Diluted EPS

	Year Ended December 31,
(in thousands, except per share data)	2015		2014		2013
Net income	$	45,292	$	107,936	$	87,296
Weighted-average common shares outstanding - basic		48,981		48,562		47,851
Effect of diluted stock options and unvested restricted stock		685		552		738
Weighted-average common shares outstanding - diluted		49,666		49,114		48,589
Net income (loss) per share:
Basic	$	0.92	$	2.22	$	1.82
Diluted	$	0.91	$	2.20	$	1.80
Anti-dilutive securities not included above		1,372		9		860

Cash and Cash Equivalents and Restricted Cash

	As of December 31,
(in thousands)	2015		2014
Cash and cash equivalents	$	18,409	$	40,846
Company's share of joint venture cash and cash equivalents		57,043		94,737
Total cash and cash equivalents	$	75,452	$	135,583
Restricted cash	$	45,853	$	44,370

Tax Effects of Componenets of Other Comprehensive Income (Loss)

	Year Ended December 31,
	2015						2014						2013
(in thousands)	Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount		Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount		Before-Tax Amount		Tax (Expense) Benefit		Net-of-Tax Amount
Other comprehensive income (loss):
Defined benefit pension plan adjustments	$	31	$	1,995	$	2,026	$	(13,887)	$	5,732	$	(8,155)	$	18,675	$	(7,765)	$	10,910
Foreign currency translation adjustment		(5,897)		2,683		(3,214)		(1,086)		448		(638)		(1,212)		474		(738)
Unrealized gain (loss) in fair value of investments		1,123		(357)		766		346		(141)		205		(744)		189		(555)
Unrealized gain (loss) in fair value of interest rate swap		(37)		(88)		(125)		594		(245)		349		948		(370)		578
Total other comprehensive income (loss)	$	(4,780)	$	4,233	$	(547)	$	(14,033)	$	5,794	$	(8,239)	$	17,667	$	(7,472)	$	10,195

Changes in AOCI Balances by Component

(in thousands)	Defined Benefit Pension Plan		Foreign Currency Translation		Unrealized Gain (Loss) in Fair Value of Investments		Unrealized Gain (Loss) in Fair Value of Interest Rate Swap		Accumulated Other Comprehensive Income (Loss), Net
Balance as of December 31, 2012	$	(43,023)	$	(13)	$	240	$	(778)	$	(43,574)
Other comprehensive income (loss)		10,910		(738)		(555)		578		10,195
Balance as of December 31, 2013	$	(32,113)	$	(751)	$	(315)	$	(200)	$	(33,379)
Other comprehensive income (loss)		(8,155)		(638)		205		349		(8,239)
Balance as of December 31, 2014	$	(40,268)	$	(1,389)	$	(110)	$	149	$	(41,618)
Other comprehensive income (loss)		2,026		(3,214)		766		(125)		(547)
Balance as of December 31, 2015	$	(38,242)	$	(4,603)	$	656	$	24	$	(42,165)

(1)There were no reclassifications from AOCI during the three years ended December 31, 2015.